ratchet

棘轮、棘齿机械

The ratchet lets the wheel turn one way but not back.

棘轮让轮子只能单向转动，无法回转。

棘轮扳手、棘轮起子

Hand me the ratchet so I can loosen these bolts.

把棘轮扳手拿给我，我要把这些螺栓松开。

逐步提高、逐步加强多与 up 连用

The company ratcheted up production to meet holiday demand.

公司逐步提高产量，以应付假期的需求。

逐步降低、逐步调降多与 down 连用

Both sides agreed to ratchet down the tension after talks.

双方在会谈后同意逐步降低紧张局势。

粗俗的、低级的、邋遢的美式俚语、贬义

He called the whole party ratchet and left early.

他说整场派对都很low，就提早离开了。