Potamobenthos
河流的底栖有机体
🗣️ 情景例句
Nothing much.
没什么要紧的事。
I haven't the least idea.
我一点儿也不知道。
Collecting as a serous hobby is quite different and has many advantages.
作为一种严肃的业余爱好的收藏活动完全是另外一回事，它具有许多益处。