1
in calm air
表示在无风的环境中。
The balloon floated gently in calm air.
气球在平静的空气中轻轻漂浮。
无风,平静大气
先理解核心含义，再看它在真实句子里的用法。
无风,平静大气
still air with no wind
The balloon floated gently in calm air.
气球在平静的空气中轻轻漂浮。
The lake was perfectly still under the calm air.
在无风的平静大气下，湖面纹丝不动。
Sailors prefer calm air for safe docking.
水手们更喜欢平静的大气以便安全靠岸。
A hot air balloon requires calm air to launch safely.
热气球需要平静的大气才能安全升空。
表示在无风的环境中。
The balloon floated gently in calm air.
气球在平静的空气中轻轻漂浮。
用作主语，描述空气的状态或作用。
Calm air surrounded the peaceful garden.
平静的空气环绕着宁静的花园。
calm air 作为动词宾语，常见于 enjoy, breathe 等动词。
They enjoyed the calm air after the storm.
暴风雨后他们享受着平静的空气。
Not this
There is a calm wind today.
Use this
There is calm air today.
风（wind）不能描述为'平静'，而空气（air）可以；应使用'calm air'来描述无风状态。
Not this
I want to calm air in this room.
Use this
I want calm air in this room.
'calm air'是名词短语，不能用作动词；应直接使用名词短语，或改为'I want the air to be calm.'
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