这个棘轮扳手可以防止螺丝松动。

The ___ratchets in this wrench prevent the bolt from loosening.

随着谈判的进行，双方的报价在逐步攀升。

The offers from both sides keep ___ratcheting up during the negotiations.

那个家伙总在背后说人坏话，真是个卑鄙小人。

That guy always talks behind people's backs—what a ___rat.