Biosystematics
[植] 生物系统学
🗣️ 情景例句
have become good friends, haven't you?
成了好朋友，不是吗？
This mountain range has many high peaks and deep canyons.
这条山脉有许多高山峰和深峡谷。
Her mother died when she was eight years old.
她8岁时母亲就去世了。