Methylenation
[化] 亞甲基化作用
??? 情景例句
Sure, what do you want?
可以啊。什么事
We can't get good pictures on our TV set.
我們的電視機圖象有問題。
She got up before 7 o'clock in the morning, and quickly washed her hands and face.
00以前起床，快快地洗手洗臉。