The controller turns on the pump when the sewage tank is full and pumps the sewage into a force main.

控制阀在污水缸变满时启动泵，并把污水抽进压力总管道。

youdao

The Air Force quickly became the think tank's main contractor, and Rand began consulting on everything from propeller turbines to missile defense.

空军很快成为了这家智库的主要承包商，兰德开始就从螺旋桨涡轮到导弹防御等一切问题进行咨询。

youdao

The main force of the enemy met with a check.

敌人的主力受到了牵制。

《新英汉大辞典》

Arthur Conan Doyle,creator of the fictional detective Sherlock Holmes, wrote about Poe's influence on other crime writers: "Each may find some little development of his own, but his main art must trace back to those admirable stories of Monsieur Dupin,so wonderful in their masterful force, their reticence,their quick dramatic point."

VOA: special.2009.02.02

In a matter of months, we will reach a milestone, when the Afghan forces will move into the lead across the country, while ISAF's (International Security Assistance Force) main effort will shift from combat to support.

BBC: UK combat operations in Afghanistan effectively cease

Mr Sechin is seen as the main force behind the attack on Yukos and Mikhail Khodorkovsky.

ECONOMIST: Russia's presidency

Accordingly, the materials are destined for the "Revolutionary Guards", the main force protecting the Iranian regime.

CENTERFORSECURITYPOLICY: Center For Security Policy