Serine
[化] 丝氨酸\\n[医] 丝氨酸, 羟基丙氨酸
🗣️ 情景例句
When was your last complete physical?
上一次全身检查是什么时候？
A friend is a second self.
朋友是另一个我。
I simply don't know. He may have plans, but he hasn't yet spoken to me about them.
我一点儿都不知道。他也许有计划，但他还没跟我谈他的想法呢。