1
a/an + airstream
An airstream is a flow of air.
一股气流就是空气的流动。
气流
先理解核心含义，再看它在真实句子里的用法。
气流
a relatively well-defined prevailing wind
An airstream is a flow of air.
一股气流就是空气的流动。
气流
A flow or current of air.
物体周围的气流
The flow of air around an object.
The warm airstream from the south brought mild weather to the coast.
来自南方的暖气流给海岸带来了温和的天气。
Pilots monitor the airstreams at high altitudes to save fuel.
飞行员监测高空气流以节省燃油。
A strong airstream pushed the clouds across the valley quickly.
一股强气流迅速将云层吹过了山谷。
An airstream is a flow of air.
一股气流就是空气的流动。
特指当时的气流。
The airstream carried the balloon north.
气流将气球向北吹去。
The airstream flows steadily from west to east.
气流稳定地从西向东流动。
Not this
The airstream in this room is poor.
Use this
The airflow in this room is poor.
中文“气流”可指空气流动，但英语中airstream通常指大气中的定向气流（如高空急流），而室内通风常用airflow。
Not this
We encountered airstream during the flight.
Use this
We encountered an airstream during the flight.
airstream是可数名词，单数形式前需要不定冠词an，因为后接元音音素。中文缺乏冠词，学习者易遗漏。
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可数名词，常用单数形式
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY.