He took a worm and dropped it into a glass of water.

他把一条蠕虫和放进一个放满水的玻璃瓶内。蠕虫在水中不停地蠕动。

youdao

He took a worm and dropped it into a glass of water.

他把一条蠕虫和放进一个放满水的玻璃瓶内。蠕虫在水中不停地蠕动。

youdao