Potamobenthos
河流的底栖有机体
🗣️ 情景例句
It's cold outside.
外面很冷。
I often go to work in the morning.
我常常在早上去工作。
he realizes its volume, as the space that the shape displaces in the air.
他能意识到物体的体积，那就是它的形状在空气中所占的空间。