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tighten/
'taɪtn
/
1.vt.[+rope] [ strap]
拉紧
2.vt.[+screw] [ bolt]
弄紧
3.vt.[+grip] [ security] [ rules etc]
加紧
4.vi.[grip+]
握紧
5.vi.[rope] [ strap etc+]
拉紧