Periost
[医] 骨膜
🗣️ 情景例句
I'm afraid the cardboard boxes are not strong enough for transport by sea.
我担心这种纸箱，用于远洋运输，不够结实。
Why torture yourself?
你这是何苦呢？
Is it your sister, Kate?
是你的妹妹，凯特？