Cona
[医]concanavalin A
🗣️ 情景例句
It's tough getting an O.K. from the boss.
很难从老板那听到声“同意”。
Come back here, you brat!
回来，你这臭家伙！
It is almost impossible to take your mind off the journey.
想摆脱开旅途的困扰是很难的。