knock at the door 敲门。

例句：

There was a knock at the door.

门外传来敲门声。

扩展资料

Suddenly there was another knock at the door.

突然，又有人敲门。

Just as breakfast was completed there was a knock at the door.

早饭刚吃完，有人敲门。

Just when she was going to bed, there was a knock at the door.

正当她要上床睡觉时，有人敲门。

Ring the doorbell or knock at the door before you enter the room.

在你进入房间之前，按一下门铃或敲门。