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英语词组“be off”的意思是离开，走开，失效，出故障。读音为：英 [bi ɒ f] 美 [bi ɑː f]。例句：I'll be off now and let you get on with your work. 我将离开，让你继续工作。
在英语中，“be off”通常用于表达某人或某物离开了某个地方或状态，或者失去了某种功能或效果。它也可以用于表达对某事的不满或抱怨，表示事情出了问题或无法按预期进行。
以下是一些含有“be off”的例句：
1. I'm sorry, but I have to be off now. 我得走了。
2. The computer is off because there's a power cut. 电脑因为停电而停止工作。
3. I'll be off now if you want to carry on discussing things. 如果你们还想继续讨论问题，我就先走一步了。
4. Sorry, I'm going to be off now. But don't worry, we'll catch up soon. 我要离开了，别担心，我们会很快再见面的。
5. They are planning to be off on vacation soon. 他们计划不久要度假。
6. The train was delayed due to a technical problem and was off for the night. 由于技术故障，火车晚点了，无法运行一整夜。
7. I'm sorry, but I have to be off because of a family emergency. 很抱歉，我必须离开，因为家里有紧急情况。
8. The doctor advised him to be off from work for a few days due to illness. 由于生病，医生建议他休息几天。
9. My computer just went off and I don't know what to do. 我的电脑突然停止工作，我不知道该怎么办才好。
10. Sorry, the restaurant is closed today because the chef is off sick leave. 对不起，今天餐厅关门了，因为厨师请病假。
以上这些例句都可以使用“be off”来表示某种情况的变化或终止。总的来说，“be off”是一个常用的英语词组，可以在各种情况下使用。
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