Flush the toilet after use.

使用后冲洗马桶。

He used water to flush his face.

他用水冲洗了脸。

You need to flush this pipe.

你需要冲洗这个管道。

Remember to flush the pipes to prevent clogs.

记得冲洗管道以防止堵塞。

You should flush the wound with clean water.

你应该用干净的水冲洗伤口。