摘要：at all hours的hour被泛化成“时间/时刻”。all hours含义是“所有时刻，随便什么时候”。at all hours即为“随便在什么时候”，这往往表达不满的情绪。如

at all hours的hour被泛化成“时间/时刻”。all hours含义是“所有时刻，随便什么时候”。at all hours即为“随便在什么时候”，这往往表达不满的情绪。如

【例句1】She thinks she can call me at all hours of the day and night. （她认为她可以不管白天黑夜都能给我打电话。）[牛津高级学者辞典]

【例句2】We noticed cars coming and going at all hours. （我们注意到汽车总是地来来往往。）[剑桥高级学者辞典]

【例句3】The house was occupied by students, who came and went at all hours. （房子里挤满了学生，他们随随便便地来来去去。）[剑桥高级学者辞典]

也可以对“高强度持续”不满，如

【例句4】Their poor dog barked at all hours. (他们可怜的狗不停地吠叫。) [剑桥高级学者辞典]

【例句5】They keep calling me at all hours (of the day and night).（他们日夜不停地给我打电话。） [剑桥高级学者辞典]

【例句6】They played loud music at all hours of the day and night.（他们日夜不停地闹哄哄玩音乐。） [剑桥高级学者辞典]

也可以对“结束时间”不满，如

【例句7】He's started staying out till all hours (= until very late at night).（他开始在外面想待到什么时候就待到什么时候。）[牛津高级学者辞典]

也可以用于中性语调，如

【例句8】If you have a problem, you know you can call at any hour of the day or night. (如果你有问题，你知道你可以在白天或晚上的任何时间打电话。)[朗文当代英语词典]

【例句9】She's up studying till all hours (=until unreasonably late at night).(她一直学习到深夜。)[朗文当代英语词典]

人的活动节奏大体为“小时(hour)”量级，所以hour被泛化成“时间”。这大概是at all minutes/seconds/days没有这样用法的原因。

来源：故梦动漫