Plana
[醫(yī)]〔單planum〕平面
??? 情景例句
But it is not polite to ask older people their age.
但問老人的年齡是不禮貌的。
All is not gold that glitters.
閃光的東西并不都是黃金。
I want to improve, but I don't know how.
我想提高它，但又不知道怎么樣才能提高。