基本解释不知做什么好 闲着无事 无所事事同根派生 be at a loose end相关词英汉例句双语例句Not wanting to be left at a loose end, the retired worker volunteered to repair shoes for the neighbourhood.那位退休工人不愿在家闲着，自愿在街道上帮助补鞋。dict.cnbe at a loose end更多例句英英字典剑桥英英字典to have nothing to dobe at a loose end剑桥字典be at a loose end柯林斯字典