Protolithic
a. 原始石器时代的
🗣️ 情景例句
till you get to the end of the fence.
到栅栏的尽头。
Fortune is fickle.
天有不测风云，人有旦夕祸福。
A great many former pupils will be attending a farewell dinner in his honour next Thursday.
很多老同学都准备参加下星期四为他举行的告别宴会。