Desaminocanavanine
[化] 脱氨刀豆氨酸
🗣️ 情景例句
But first you have to smile.
但首先你得笑一笑。
Reading is to the mind what exercise is to the body.
读书养神，锻链健身。
How long has this factory been open?
这家工厂建成有多久了？