Ecostratigraphy
生态地层学
🗣️ 情景例句
Lots of people are tired of higher taxes.
许多人对于增税很厌烦。
Try not to be so timid when you speak.
你讲话的时候不要那么紧张。
I appreciate John's helping in time.
我感谢约翰的及时帮助。