Polycysteine
[化] 聚胱氨酸
🗣️ 情景例句
Where did you get such a nice tan?
你到哪把皮肤晒成棕色的？
A man alone is either a saint or a devil.
孤身独处的人可以为圣哲，也可为恶魔。
There was a big civil rights march through the centre of Birmingham yesterday.
昨天大规模的民权示威游行经过伯明翰市中心。