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BNC: 1823 COCA: 1559
leafnoun [ C ]uk/liːf/ us/liːf/ plural leaves

leaf noun [ C ] PLANT

B1 one of the flat, usually green parts of a plant that are joined at one end to the stem or branch叶，叶片，叶子，树叶

a palm leaf棕榈树叶
autumn leaves秋叶
He was raking up leaves in his garden.他在自己的花园里扫集树叶。
be in leaf/come into leaf

When a plant is in leaf or when it comes into leaf, it has or gets leaves on it.（植物）长出叶子

The trees are in leaf early this year.今年树木的叶子长得早。
The bushes are just coming into leaf.灌木刚刚长出叶子。

More examples

The leaves on the trees have started to turn a rich coppery colour.

Rubbing a dock leaf on nettle stings helps to relieve the pain.

Notice that the leaf of this plant has ragged edges.

Emily scraped away the dead leaves to reveal the tiny shoot of a new plant.

The bush looked badly diseased, with black marks on all the leaves.

leaf noun [ C ] PAPER

a thin sheet of paper（纸张的）页，片，张

leaf noun [ C ] TABLE

an extra part of a table that can be folded away when not being used活动桌板，折叠桌板

Idiom(s)

take a leaf out of sb's book
BNC: 1823 COCA: 1559
leaf

noun

ADJECTIVE | VERB + LEAF | LEAF + VERB | LEAF + NOUN | PHRASES ADJECTIVE➤new, young新葉；嫩葉▸➤autumn, fall (NAmE) 秋葉▸➤dead, dry, fallen, falling, rotting枯葉；乾葉；落葉；飄落的葉子；腐葉◇The ground was thick with dead leaves.地上積了厚厚的枯葉。➤broad (especially technical術語) , heart-shaped, oval闊葉；心形葉；卵形葉◇broad-leaf plants闊葉植物➤green, yellow, etc.綠葉、黃葉等▸➤glossy, hairy, leathery, shiny, variegated光滑的／長茸毛的／堅韌的／光亮的／雜色的葉子▸➤bay, lettuce, maple, oak, tea, etc.月桂葉、萵苣葉、楓葉、橡樹葉、茶葉等◇Stop trying to read tea leaves (= predict the future).別再試圖預測未來了。VERB + LEAF➤have有葉子◇This plant has beautifully variegated leaves.這種植物的葉子色彩斑斕，非常漂亮。➤come into, grow, produce, put out, sprout長出葉子；冒出葉子◇It was spring and the trees were coming into leaf.春天來了，樹木發芽了。◇In the spring the plant began to put out new leaves.春天這株植物開始長出新葉。➤shed落葉◇Deciduous trees shed their leaves annually.落葉樹木每年都落葉。➤pick, pluck摘下／扯下葉子◇He picked a leaf from the basil plant and started to chew it.他摘下一片羅勒葉子嚼了起來。➤rake耙攏葉子◇The boys helped by raking the leaves in the yard.男孩們幫忙把院裏的樹葉耙攏起來。LEAF + VERB➤appear, emerge葉子長出◇Spring arrived and the first green leaves began to appear.春天到了，第一批綠葉開始長出來了。➤grow葉子生長▸➤turn, yellow葉子變黃◇The summer was over and the leaves were beginning to turn.夏季過去了，葉子開始變黃。➤drop, fall葉子掉落／落下➤blow葉子隨風而動◇dry leaves blowing in the wind在風中舞動的枯葉➤rustle葉子沙沙作響◇The leaves rustled in the light breeze.樹葉在微風中沙沙作響。LEAF + NOUN➤litter, mould/mold落葉層；腐葉土◇the leaf litter on the forest floor森林的落葉層PHRASES➤in full leaf枝繁葉茂◇The corn was already ripening and the trees in full leaf.玉米已經成熟，樹木也已枝繁葉茂。
BNC: 1823 COCA: 1559
BNC: 1823 COCA: 1559
leaf
Parts of plants: aerial root, anther, beanstalk...
Parts of trees: bark, blossom, bole...
Parts of books: acknowledgments, addendum, afterword...
Parts of pieces of furniture: caster, castor, drawer...
Metalworking and forms of metal: anvil, bar, beat...
To read something quickly: glance, skim, flick through...

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