Please make sure all mobile phones are switched off during the performance.
请确保演出时关上所有手机。
The firecrackers went off during the night.
夜里放了鞭炮。
The student began to nod off during math class.
那学生上数学课的时候开始打盹。
Grandmother often nods off during the afternoon.
祖母下午常常打瞌睡。
他在看电影时打起了瞌睡。
He dozed off during the class.
他上课打瞌睡。
我看电影时打起盹儿来了。
在影片期间，我打瞌睡。
She dropped off during the sermon.
她在听布道时睡著了。
He used to nod off during the French class.
他以前总是在法语课上打瞌睡。
He used to nod off during the French class.
他过去常在上法语课时打瞌睡。
The phone line was cut off during the storm.
电话线在暴风雨中被切断了。
The astronauts were waved off during the launch.
发射过程中，宇航员挥手告别。
The storm just whipped the roof off during the night!
昨晚的暴风雨一下子把房顶掀掉了。
All the mobile phone must be kept off during the meeting.
开会期间所有的手机必须一律关掉。
All mobile phone and beeper must be switched off during lesson.
学员在上课期间必须将手提电话及传呼机关掉。
Do not turn the power off during the firmware writing operation.
固件写入过程中切勿关闭电源。
Specifically, turn it off during meetings or on important occasions.
尤其在会议中或是一些重要的场合都要将手机关掉。
House sales in this city usually slack off during our severe winters.
在严寒的冬季，这座城市的房产通常销路不好。
How many days will people take off during the Thanksgiving day season?
感恩节期间人们会休几天假？
And what is more, beepers and mobile phones must be off during the concert.
另外，音乐会期间，传呼机和手机必须关闭。
The trees have been dying off during the severe winter, and there are few left.
在严冬，树一棵一棵地死掉了，剩下的寥寥无几了。
Please make sure all pagers and mobile phones are switched off during the performance;
演出期间请关闭手机及响闹装置；
Please make sure all pagers and mobile phones are switched off during the performance;
演出期间请关闭手机及响闹装置；
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