ratchet

n.

（防倒转的）棘齿；

vt.

安装棘轮于；松脱；把…造成棘齿形，于…作棘齿，在…上刻锯齿；

复数：ratchets过去式：ratcheted过去分词：ratcheted现在分词：ratcheting第三人称单数：ratchets

ratchet wheel n. [机]棘轮

ratchet effect齿轮效应

ratchet up逐渐升高；略微调高

1. A ratchet allows a heavy weight to be raised in short successive stages.
   棘轮可在简短连续的步骤内就把一个重物抬高。
2. In a computer, the games are played 100 times, mimicking a ratchet with many teeth.
   在计算机中，这个游戏进行100次，以模拟有许多齿的棘轮。

1. Smoking and alcohol ratchet up the damage several more notches.
   吸烟和喝酒加深了这种损伤。

Optical thermal ratchet.
Ratcheting up the Ratchet: On the Evolution of Cumulative Culture
A ratchet-like inter-subunit reorganization of the ribosome during translocation
Fitness of RNA virus decreased by Muller's ratchet.
Planning under Incomplete Information and the Ratchet Effect
Ecology and the ratchet of events: climate variability, niche dimensions, and species distributions.
The speed of Muller's ratchet with background selection, and the degeneration of Y chromosomes.
Cellular motions and thermal fluctuations: the Brownian ratchet
The accumulation of deleterious genes in a population--Muller's Ratchet.
Force generation by actin polymerization II: the elastic ratchet and tethered filaments.