Serine
[化] 丝氨酸\\n[医] 丝氨酸, 羟基丙氨酸
🗣️ 情景例句
But you just got here. Can't you stay a little longer?
可你刚刚到，再多呆一会儿，好吗？
If the sky falls,we shall catch larks.
天垮正好抓云雀；不要杞人忧天。
The maximum weight allowance is 60 kilos per traveler, excluding hand luggage.
每个旅客托运的行李最大重量限额是60公斤，手提行李除外。