Waco
abbr. 世界空运组织（World Air Cargo Organization）
🗣️ 情景例句
How often do you go running?
你多久跑步锻炼一次？
If it is left too long, it begins to give off a bad smell.
假如把它放得太久了，它就会开始发臭。
No, they aren't. They're their books.
不，不是我的。这些是他们的书。