3 sentences for 气流 (qì​liú — airflow)

1. 这间办公室的窗户很小，室内气流不通。

   zhè jiān bàn​gōng​shì de chuāng​hu hěn xiǎo, shì​nèi qì​liú bù tōng.

   The windows in this office are very small, and there is no airflow inside.

   Source: Dong Chinese Dictionary

2. 口音与鼻音的区别在于发音时气流是否经过鼻腔。

   kǒu​yīn yǔ bí​yīn de qū​bié zài​yú fā​yīn shí qì​liú shì​fǒu jīng​guò bí​qiāng.

   The difference between oral and nasal sounds lies in whether the airflow passes through the nasal cavity during pronunciation.

   Source: Dong Chinese Dictionary

3. 冷空气与暖气流在这一带交汇，产生了大范围的降雨。

   lěng kōng​qì yǔ nuǎn qì​liú zài zhè yī​dài jiāo​huì, chǎn​shēng le dà fàn​wéi de jiàng​yǔ.

   The meeting of cold and warm air masses in this area resulted in widespread rainfall.

   Source: Dong Chinese Dictionary