Seral
a. [生态]演替系列的
🗣️ 情景例句
African athletes are good at track and field events.
非洲选手擅长田径项目。
This window is just as wide as that one.
这扇窗户就象那一个一样宽。
I'm sorry, but I have to cancel out luncheon appointment.
真抱歉，不过我不得不取消我们午餐的约会。