短语词组短语hang by a hair 千钧一发;岌岌可危;摇摇欲坠;危在旦夕hanging by a hair 系于一发;毛式悬挂miss by a hair 一念之差Hand by a hair 危在旦昔off by a hair 差之毫厘hung by a hair 岌岌可危win by a hair 以毫发之差险胜by a single hair 一点儿 返回 by a hair