A2 [ U ] the mixture of gases that surrounds the earth and that we breathe空气
B2 the space above the ground, especially high above the ground空中,天空
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The balloon rose gently (up) into the air.
The volcano spewed a giant cloud of ash, dust, and gases into the air.
The extent of the flooding can only be fully appreciated when viewed from the air.
The ball carried high into the air and landed the other side of the fence.
A cloud of dust rose in the air as the car roared past.
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It's the dampness in the air that is bad for your lungs.
He let the air out of the balloon.
The mountain air was wonderfully pure.
There was a rush of air as she opened the door.
Stricter controls on air pollution would help to reduce acid rain.
Warm air rises by the process of convection.
A2 [ U ] travel in an aircraft乘坐飞机;航空
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The air force counterattacked and repelled the invasion.
Human error has been blamed for the air crash.
Will the goods be sent by air or sea freight?
The resort is easily accessible by road, rail, and air.
The policy of charging air travellers for vegetarian meals proved unpopular and has already been rescinded.
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He had a slight air of menace which I found unsettling.
He retains an almost professorial air.
I just assumed he owned the place - he had a proprietary air about him.
The company operates out of modern offices and expensive hotel suites to create an air of respectability.
He glared at me with an air of accusation.
C1 If a programme or a person is on/off (the) air, they are/are not broadcasting on radio or television.正在/停止播出
[ C ] a simple tune曲调,旋律
[ T ] to make opinions or complaints known to other people说出,公开,亮出(观点等)
[ I or T ] to become dry and/or fresh, or to cause to become dry and/or fresh(使)晾干,(使)风干;(使)烘干;(使)通风
[ I or T ] US to broadcast something or be broadcast on radio or television广播,播出,播送
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