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1·By the mouth of the tunnel he bent to retie his shoelace.

到隧道的入口处，他弯腰重新系了系鞋带。《柯林斯英汉双解大词典》

2·At intervals she stands up to rest, and to retie her disarranged apron, or to pull her bonnet straight.

她时而站起来休息一会儿，把弄乱了的围裙重新系好，或者把头上戴的帽子拉拉整齐。