松紧的英文：
degree of tightness; elasticity

参考例句：
  • Adjust the tension of a violin string,a tennis racket,etc
    调小提琴弦、网球拍等的松紧
  • A device at the lower end of the bow for a stringed instrument, used for tightening the hairs.
    松紧旋纽琴弓尾端的装置，用于松紧金属丝
  • In our childhood, we sewed an elastic band inside our trousers to serve like today's waistband.
    小时候，我们的裤子都是不系腰带的， 就缝一根松紧带在里边。
  • Soon he returned in a shirt, slacks and sandals, and found her eating with appetite
    不一会儿，他穿着衬衣，松紧裤和便鞋回来了，看到她吃得正香呢。
  • For a string of specified length, tautness and density only certain note can be generated
    一根确定长度、松紧和密度的弦只能发出某某音。
  • Softly tailored waistcoats are fitted with and lined, with low armhole, front welts and an elastic back.
    柔软西装式背心的特点是合身、有衬里、低袖窿、前身嵌线袋、后身装有松紧襻。
degree是什么意思：
n. 阶层；度；学位；程度
  • (degree of)importance,seriousness or influence
    重要性、严重性或影响力（的程度）
  • current amplification degree
    电流放大率
  • These universities are entitled to grant degrees.
    这些大学有权授予学位。
tightness是什么意思：
n. 坚固，紧密；憋闷
  • tightness of warp
    经纱紧密度
  • Stretch the rope tight, please.
    请把绳子拉紧。
  • Uncomfortably tight and confining.
    不适地紧绷的，不适地束缚的
elasticity是什么意思：
n. 弹性，弹力；灵活性，伸缩性
  • elastic resilience
    弹性回能|弹能
  • Rubber is elastic.
    橡皮是有弹性的。
  • This plan is fairly elastic.
    这个计划有相当的灵活性。

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