tightening
n. 上紧；固定；紧密
sp. 动词tighten的现在分词形式.
近义词：constriction，contraction，compression，shrinking，jerking，cramp，spasm，tic，convulsion，loosening，
英英释义
Noun
- the act of making something tighter;
"the tightening of economic controls"
例句
用作名词(n.)
- The tightening force required for gasketed connections is somewhat dependent on the washer material being used.对于衬垫接头，所要求的上紧的力量稍微依赖于正在使用的垫圈材料。
- Beer contains herbs known as hops which are natural astringents that have beneficial tightening effect on the scalp.啤酒含有所谓的富有收敛剂的蛇麻草，这有益于使头皮紧密。