Biostratigraphic
a. [古生]生物地層的
??? 情景例句
get some background on the job.
了解這項工程的一些背景。
I wouldn't worry about it, if I were you.
如果我是你，我就不會擔心。
Well, would you like something to drink? What about a glass of milk?
你想喝些什么嗎？要不要一杯牛奶？