- n. 棘轮效应；渐近管制；联轴节；离合器
- v. 装棘轮机构于；像棘轮般转动；渐变（ratchet的ing形式）
- n. mechanical device consisting of a toothed wheel or rack engaged with a pawl that permits it to move in only one direction
同义词： rachet ratch
- v. move by degrees in one direction only
"a ratcheting lopping tool"
同义词： rachet up ratchet down