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1·Relax, smile; loosen up in mind and body.

放松，微笑；身心俱放松。《柯林斯英汉双解大词典》

2·I must take some exercise and loosen up my muscles.

我必须运动一下，放松放松肌肉。《新英汉大辞典》

3·The officials have been instructed to loosen up on the rules for admitting people into the country.

官员们接到指示，放宽入境规定。《新英汉大辞典》

4·Loosen up your muscles, please.

请放松您的肌肉。

5·Or should neat freaks loosen up?

还是洁癖鬼该放松一下？

6·Loosen up your shoulders.

肩膀放松。

7·Allow them to loosen up.

让它们松开。

8·Your shoes will loosen up with wear.

你的鞋穿穿就会松的。

9·Young people often loosen up on the dance floor.

年轻人常在舞池中放松自己。

10·I loosen up with a few exercise before the match.

比赛前我做了一些准备活动。