Air-filtration
空氣過濾
?? 詞語組成解析
air
[??]
n. 天空;氣氛;空運;（簡單易記的）曲調(diào);
vt.& vi. 晾曬;烘干;播送;廣播;
vt. 使房間通風， 透氣;
n. 過濾\\n[化] 過濾
??? 情景例句
Financial security, that's what it's all about.
家庭財政狀況無憂，這就夠了。
How much for a one-way ticket to shanghai?
去上海的單程票多少錢？
Is it okay to smoke in the office?
在辦公室里抽煙可以嗎？