back entrance造句

1、There is a front and a back entrance to the theatre.
这家剧院有一个前门和一个后门。

2、Here the air and water discharged from the return valve to the back entrance of the impeller.
在这里空气排出而水又从回流阀返回到叶轮入口。

3、There is a front and a back entrance to the house
这所房子有一个前门和一个後门

4、We used the back entrance to the building.
我们是从大楼的后门入口走进去的。