Serine
[化] 丝氨酸\\n[医] 丝氨酸, 羟基丙氨酸
🗣️ 情景例句
I heard that some tours actually go down into the canyon. Is that true?
我听说有的旅游团真正下到峡谷里去了。那是真的吗？
It's one o'clock sharp.
现在一点整。
They played a shameful part in the whole affair.
他们在这一事件中扮演了可耻的角色。