Argvalin
[化] 精纈氨素
??? 情景例句
How many are there in your family?
你們家幾口人？
I'll finish working at 5:30 and get home by 6 o'clock.
我希望在5:30完成工作并且在6點鐘回家。
What happened on the march then?
那么 ，在游行中發生了什么事？