Biochron
生物年代, 较短时期的化石, 生物时
🗣️ 情景例句
Say, don't I know you from somewhere?
我是不是在哪里见过你？
Being the newest member of this committee is really difficult.
能成为这个集体的新成员是很难的。
Have you just been to the cinema?
你刚去过电影院吗？