Acetidin
[化] 乙酸乙酯
??? 情景例句
but when I received the letter
但是當我收到那封信
How ofter did I tell you to sit straight?
我告訴你多少次要坐正?
No problem! Tell me, do I have to take them before or after meals?
“那不難！告訴我，我是在飯前還是飯后吃呢？”