习惯用语24/7是二十四小时和七天的简称。知道了这个来源它的意思就很明显了。我们知道一天一共二十四小时，而一星期总共七天，所以24/7把一星期里的每一天、一天里的每一小时都包括在内了。换句话说就是全部时间，或者每时每刻。
例如：Susan has been dating Gary for about a week, and she likes him a whole lot. It's difficult to get in touch with her because she's with him 24/7.
Susan和Gary开始谈恋爱差不多有一星期了。她非常喜欢Gary。最近特别难找Susan，因为她一天到晚都跟Gary在外面约会。
24/7尽管来自年轻人，但不少略微年长的人受了年轻人的影响也在用这个说法。
例如：Taking care of babies is very difficult because they can't tell you what they want. My baby cries when he wants food, sleep, toys, or to be changed--everything. It seems like he is crying 24/7.
照顾孩子可真难，因为他们不会说自己想要什么。我那孩子一不对劲就哭，要吃了，要睡了，要玩具或者要换尿布了，都会哭。他似乎老在那儿没完没了地哭。
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