Quadrine
[化] α-氨基丁酸; α-氨基正丁酸
🗣️ 情景例句
And you never know
而你永远也猜不到
If she gets mad with him, she will not speak to him for days.
她对他一生气就会许多天不跟他说话。
What are you up to?
你在忙什么呢？