Put the chicken in the oven when the timer goes off.

当定时器响起时，把鸡肉放入烤炉。

《柯林斯英汉双解大词典》

Set a timer and try to work, but when the timer goes off, stop.

定好闹钟，试着去工作，但是当闹钟响起，停止工作。

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Set a timer to go off when it's time to switch tasks.

设置定时器提醒到时转换任务。

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Set a timer to go off when it's time to switch tasks.

设置定时器提醒到时转换任务。

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