如果妈妈说“刷牙”，比利就去刷他的牙齿。

If his mother says, "brush your teeth," Billy brushes his teeth.

youdao

刷了两遍之后，他的牙齿变的又白又干净。

When they were brushed twice, his teeth became white and clean.

youdao

刷了两遍之后，他的牙齿变的又白又干净。

When they were brushed twice, his teeth became white and clean.

youdao