n.上紧；固定；紧密
动词tighten的现在分词形式.
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。
强制性节约
