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Don't dial my heart number it is already engage to someone else.

别拨往我内心的号码，它早已接通。

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I've dialled the number so many times I know it by heart.

这个号码我拨了很多次，都记住了。

《牛津词典》

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Heart and respiration monitors provide the investigator with the number of heartbeats or breaths taken when a new stimulus is presented.

当新的刺激出现时，心脏和呼吸监测仪为研究者提供其心跳或呼吸的次数。