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- critical mass 122
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- multifaceted 90
- bread bin 134
- field goal 107
- lasting 82
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- Conscript 43
- cookware 327
- brightness 229
- closing time 77
- Reimburse 13
- peak 842
- flowerbed 176
- block party 76
- moat 36
- clampdown 179
- Collision 53
- murderess 9
- Decoy 43
- job-sharing 6
- update 95
- embedded 143
- IN 41
- harridan 5
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- Aggressive 1320
- carbon dioxide 114
- subservient 34
- improvement 1818
- Urge 371
- marxist 2
- custom 324
- Near 151
- lance 11
- boost 508
- brexit 16
- emaciation 164
- colour supplement 83
- mandible 5
- goods 310
- amid 165
- draughtswoman 10
- Flee 333
- platform 769
- girt 75
- nobble 14
- Extremely good or of a high quality 111
- skillful 984
- Value 435
- Justify 147
- deliberately 556
- gawd 42
- go back to 49
- kitchenware 20
- bank balance 106
- alack 16
- lead time 66
- helipad 9
- flick knife 135
- Display 6090
- backbeat 16
- MIST 71
- presumably 586
- unswerving 18
- longways 12
- beaut 67
- changing room 117
- assemble 819
- degeneration 120
- death throes 66
- Overarching 17
- measurable 264
- Cozy 302
- dupe 139
- heliskiing 11
- restriction 1404
- adversary 969
- distinction 1261
- Oasis 60
- dst 37
- duty 669
- bilby 24
- docent 18
- feasible 870
- deaf-and-dumb 140
- draper 82
- entertainment 1527
- Heir 7
- Funeral 131
- Delve 116
- Foe 179
- the First World War 42
- decision 663
- pine 277
- wireless 1208
- both 82
- dolled up 45
- Cactus 225
- incisive 101
- mastitis 9
- talent 461
- coffee bar 106
- Rubble 184
- flu 345
- seat 229
- amphora 14
- latvia 11
- the Midlands 8
- implausible 26
- sore 453
- inflammable 414
- antipodean 83
- go out of 92
- anglophone 132
- permanent 1271
- FIELD 41
- abundant 340
- out 1205
- Onwards 82
- leave of absence 49
- poisonous 960
- harassed 909
- mow down 38
- Accumulate 1096
- Seduce 256
- Insignificant 534
- guard of honour 52
- Steep 128
- Engineer 841
- sake 332
- corps de ballet 68
- germ 456
- adjudication 67
- decider 80
- up to (doing) sth 15
- surface 268
- amasi 1
- Browser 28
- luck 337
- keep your word 16
- Contribute 1206
- lie down 23
- expand on 49
- mod cons 112
- counter- 131
- cop out 68
- cliff 263
- orthodox 342
- Glance 245
- adv. 3
- ems 10
- day 275
- fall off 74
- belly dance 129
- podcast 214
- die back 68
- static 662
- To make someone angry or annoyed 164
- squabble 323
- truculent 60
- noel 10
- Certificate 1082
- crochet 64
- call 996
- easy-care 90
- diverticulitis 14
- feel for 62
- distinguish 931
- gbs 34
- bulkhead 212
- clearing bank 52
- Composition 27
- countenance 350
- operetta 7
- fare 406
- IMAX 2
- friendly society 87
- mill 498
- starkness 561
- self-discipline 1322
- air drop 108
- Iraqi 5
- task 751
- beer belly 158
- disinflation 148
- bacteria 675
- excess fare 18
- Creative 363
- feverishly 126
- Rightly 178
- preface 511
- ramrod 118
- jarful 10
- canst 104
- Rave 32
- energies 90
- flesh out 57
- channel-hopping 39
- dull 404
- fringe benefit 59
- double act 88
- regency 81
- four-letter word 50
- pantyhose 10
- cloudy 123
- child benefit 155
- Mash 150
- prey 139
- noisy 479
- room 445
- cancel sth out 39
- frequently 519
- fo'c'sle 26
- Erection 27
- detenu 9
- Credit 458
- digitalization 53
- disgust 285
- aviation 696
- Dutch courage 65
- impeccable 357
- attorney 271
- handcrafted 10
- Exhaustion 131
- greenness 73
- carbon 287
- capital outlay 38
- cash dispenser 86
- circuit breaker 59
- chat sb up 74
- croatia 45
- tutor 420
- outpost 102
- georgia 38
- dampen 103
- hydrofluorocarbon 7
- poverty 343
- chicken 673
- Heating and air conditioning 18
- moorland 18
- disconcert 273
- slay 192
- forgive 366
- teenager 745
- mode 654
- ester 11
- Well-worn 79
- Application 279
- fractured 169
- Reputation 1177
- forced landing 51
- demonym 40
- proprietary 519
- strategy 1330
- statue 295
- civilise 125
- capital gains tax 47
- adjective 822
- date-stamp 60
- fiancé 53
- direct speech 98
- add in 47
- Gently 41
- access 705
- transmit 546
- able 380
- Ease 178
- silver 318
- cd-video 110
- chablis 49
- ignorance 989
- broom 328
- Hoax 744
- pulse 440
- lip 372
- cutting board 40
- destitution 181
- from 95
- orthodontist 7
- housewarming 162
- choke back 80
- cred 65
- signature 710
- Gripe Water 39
- automatic 1261
- Instance 500
- fragmentation 89
- bit 194
- glbt 59
- disclose 959
- class-conscious 167
- humanitarian 10
- yoke 5
- double bluff 80
- insecure 390
- claw 512
- materialistic 59
- Inflation 1112
- feed up 61
- obsequies 14
- Pus 24
- scientific 1434
- Consultative 582
- overthrow 13
- cream 276
- appetite 1601
- Factual 191
- Irrational 303
- educated 752
- Leadership 990
- provisions 40
- imaginary 894
- ninny 13
- deferral 142
- evoke 134
- moggy 8
- bulk 384
- aussie 49
- gurdwara 108
- long 223
- gonna 59
- monitor 426
- chronological 719
- abominate 249
- live up to 58
- navaratri 4
- exhilarate 685
- undercut 121
- knit 234
- fed 41
- Optional 129
- go into 79
- garden flat 76
- hull 57
- movie 411
- cub reporter 68
- hades 64
- half-wit 222
- lackadaisical 4
- conceal 440
- bun 180
- displaced person 81
- dirt 667
- For 82
- ex 103
- Find 359
- swollen 147
- figures 64
- lead-in 50
- northwesterly 11
- do away with 57
- violet 339
- proceeds 759
- drivel 91
- pantry 96
- liberal arts 33
- gay 473
- episode 414
- perception 614
- lord 517
- chasm 80
- find 658
- kofta 5
- amend 212
- fascinating 319
- ok 312
- paper knife 3
- calculator 941
- gastronomic 130
- cloak-and-dagger 185
- nights 9
- Impressionable 29
- bargain sth away 42
- overall 472
- latter 294
- clergyman 216
- foyer 126
- sweet 153
- Popularity 301
- acquiescence 111
- take care 15
- semiconductor 641
- coreligionist 188
- midterm 14
- short-staffed 23
- technician 510
- cryptosporidium 39
- pally 13
- ongoing 108
- nm 9
- Irritated 204
- Scream 21
- faq 61
- gas pedal 56
- Session 161
- soda 290
- Buildings where people live or stay 3
- Audition 204
- overcome 1292
- check-in 580
- reintroduction 22
- inculcate 40
- habitual 1308
- Revitalize 20
- drain 591
- colourless 143
- varsity 11
- eap 49
- the pole vault 111
- full frontal 25
- gravitational 141
- sycophancy 47
- Envelope 29
- phrase 395
- nutrition 307
- departure lounge 97
- MMR 6
- limewater 8
- forwarding address 88
- hassock 11
- refuse 365
- hoagie 12
- Bodily 24
- fused 128
- confectioner 205
- free fall 113
- colorful 521
- Diametrically 199
- concrete 1032
- conjectural 172
- high table 158
- dilation 49
- presumptive 10
- lunchtime 26
- digestible 71
- devil's advocate 106
- Deem 128
- accelerate 763
- servitude 31
- garter belt 102
- all the same 75
- Around 95
- de rigueur 159
- crowd-puller 109
- ear-splitting 136
- Confuse 365
- nonobservant 3
- jnr 8
- Antagonist 92
- black-eyed pea 104
- farther 329
- adv 6
- admit of sth 25
- energy 1294
- abatement 389
- brain teaser 114
- overtook 5
- favor 306
- hosepipe 6
- overfishing 4
- proficient 26
- insurmountable 476
- prettify 250
- actualize 12
- contented 260
- full board 78
- Outperform 7
- hind 8
- interwove 8
- persistence 446
- mphil 6
- din 148
- navigation 532
- consult 330
- hoick 11
- inferiority 24
- dream team 76
- TRANSMIT 29
- armourer 467
- diary 343
- debauched 116
- dry ice 62
- Casually 115
- Behind 18
- californium 106
- Thresh 36
- rifle 348
- false start 60
- Amount 57
- mesh 84
- infinity 32
- statutory 910
- dolorous 4
- Reform 86
- specialist 1871
- iridium 2
- chigger 81
B2 a chemical element that is a gas with no smell or colour. Oxygen forms a large part of the air on earth, and is needed by animals and plants to live.氧，氧气
Examples
Air is composed mainly of nitrogen and oxygen.
Deep-sea divers carry cylinders of oxygen on their backs.
Mountain climbers use oxygen when they reach higher altitudes.
Plants are the main source of atmospheric oxygen.
The symbol for oxygen is O2.
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