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松緊的英文：
degree of tightness; elasticity

參考例句：
Adjust the tension of a violin string,a tennis racket,etc
調(diào)小提琴弦、網(wǎng)球拍等的松緊A device at the lower end of the bow for a stringed instrument, used for tightening the hairs.
松緊旋紐琴弓尾端的裝置，用于松緊金屬絲 In our childhood, we sewed an elastic band inside our trousers to serve like today"s waistband.
小時(shí)候，我們的褲子都是不系腰帶的， 就縫一根松緊帶在里邊。Soon he returned in a shirt, slacks and sandals, and found her eating with appetite
不一會(huì)兒，他穿著襯衣，松緊褲和便鞋回來了，看到她吃得正香呢。For a string of specified length, tautness and density only certain note can be generated
一根確定長度、松緊和密度的弦只能發(fā)出某某音。Softly tailored waistcoats are fitted with and lined, with low armhole, front welts and an elastic back.
柔軟西裝式背心的特點(diǎn)是合身、有襯里、低袖窿、前身嵌線袋、后身裝有松緊襻。

degree是什么意思：
n. 階層；度；學(xué)位；程度
(degree of)importance,seriousness or influence
重要性、嚴(yán)重性或影響力（的程度） current amplification degree
電流放大率 These universities are entitled to grant degrees.
這些大學(xué)有權(quán)授予學(xué)位。

tightness是什么意思：
n. 堅(jiān)固，緊密；憋悶
tightness of warp
經(jīng)紗緊密度 Stretch the rope tight, please.
請(qǐng)把繩子拉緊。Uncomfortably tight and confining.
不適地緊繃的，不適地束縛的

elasticity是什么意思：
n. 彈性，彈力；靈活性，伸縮性
elastic resilience
彈性回能|彈能 Rubber is elastic.
橡皮是有彈性的。 This plan is fairly elastic.
這個(gè)計(jì)劃有相當(dāng)?shù)撵`活性。