Polycysteine
[化] 聚胱氨酸
??? 情景例句
we'll spend more time together, Ellen.
我們會有更多的時間在一起， Ellen。
Art is long, but life is short.
人生有限，學問無涯。
I'm hungry. I haven't eaten anything since yesterday.
我很餓了，昨天到現在都沒吃過東西。