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词汇 to be tightened
例句 Existing laws on obscenity are to be tightened.现行的关于淫秽内容的法律将会更加严厉。I think the fan belt needs to be tightened.我觉得风扇皮带需要拉紧一点。One of the screws had loosened a bit and had to be tightened.有颗螺丝有点松了,必须拧紧。
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