A reciprocating piston, the inhalation and from a liquid, known as a working cycle; this pump known as the single-action pump.

活塞往复一次，各吸入和排出一次液体，称为一个工作循环；这种泵称为单动泵。

youdao

If all goes well, the mediator in essence has started a virtuous cycle of "giving face" and reciprocating favours.

如果一切顺利，调解人实质上便启动了一轮“给面子”带来当事人彼此示好而让步的良性循环。

youdao