air
单词辨析：
指人类所呼吸的地球上的气体。
There would be no life without air.
没有空气就没有生命。
Fresh air is beneficial to health.
新鲜空气有益于健康。
指围绕地球的大气层，或室内的空气。
What are the functions of the upper atmosphere?
高层大气的作用有哪些？
She felt dizzy in the smoky atmosphere.
烟雾弥漫的空气使她感到头晕。
指因空气流动而生成的和风。
She likes walking in a spring breeze.
她喜欢在春风里散步。
There is a lovely cool breeze under the trees.
树下凉风宜人。
尤指室内等处寒冷的过堂风。
The room has a draught in the winter.
这房间冬天有穿堂风。
She sat in a draught and caught a cold.
她坐在风口上，着凉了。
指具体的或抽象的行为过程或所做之事。
It is a man's actions that matter, not his words.
要看一个人的行为而不是他的言辞。
She was sorry for her actions.
她为自己的行为感到歉疚。
作此义解时通常要加冠词，指一个人表现出来的风度、气派、面貌。
a cheerful air
快活的神情
the air of a critic
批评家的风度
The candidate looked at his supporters with a determined air.
这位候选人看着他的支持者们，神态坚定果断。
尤指能够体现出性格特点的行为举止，如站立、行走的姿态等。
a military/proud bearing
军人的举止/傲慢的态度
The new CEO has a distinguished bearing.
新来的首席执行官气度不凡。
She later wrote warmly of his bearing and behaviour.
后来她以饱含热情的笔触写到了他的举止和行为。
指人在某个地方或某种情况下的表现，尤指在公开场合、工作岗位上的行为，常可与 behaviour 换用。
She kept the servant because of his good conduct/behaviour.
仆人行为可嘉，被她留了下来。
I'm glad to hear of your good conduct/behaviour at school.
听到你在学校表现良好，我很高兴。
普通用词，指对待其他人的态度和行为方式，不涉及道德规范，仅指符合传统的礼仪和要求。其复数形式 manners 指礼貌、规矩，多用于社交活动。
He has a rude manner towards his wife.
他对妻子态度粗暴。
The little girl always has good manners.
那个小女孩总是很有礼貌。
He is an expert on the manners of the ancients.
他是研究古人礼仪的专家。
指广阔的天空或某一地区的上空，其复数形式 skies 主要用于描述天气或某处的天空情况。
The sky was full of dark clouds.
天空乌云密布。
There are some birds flying in the sky.
天空中有几只鸟儿在飞翔。
English skies are temperate in spring.
英国春天的气候是温暖的。
指地面或某物的上方空间，常与定冠词 the 连用。
There were many birds flying in the air.
许多鸟儿在空中飞翔。
Airplanes enable people to travel through the air.
飞机使人们能够在空中旅行。
Flames leapt into the air.
火苗蹿向空中。
表示此义时，通常用 the heavens 形式。
The heavens shook with thunder.
雷声震撼了天宇。
The astronomer scanned the heavens through the telescope.
天文学家通过望远镜来观察天空。
相关例句：
The first bubbles to escape from the liquid are a mixture of air and hydrogen.
从该液体中最先逸出的气泡是空气和氢的混合物。
As soon as I know I'm in the team it's like I'm walking on air.
一得知我加入了这个队，我高兴得像飞上了天。
The air is so black with diesel fumes and coal dust, I can barely see.
空气中充斥着柴油烟雾和煤尘粉末，黑乎乎的，我几乎什么都看不见。
There was great excitement in the air
人人都感到无比激动。
Tonight PBS will air a documentary called 'Democracy In Action'.
今晚公共广播公司将播放一部名为《民主进行时》的纪录片。
One day a week her mother systematically cleaned and aired each room.
她母亲按部就班地每周一次清扫所有的房间并开窗通风。