It is not fire or smoke inhalation that is the number one irregular cause of death among firefighters, but heart attacks.

在消防员中，导致非正常原因死亡的头号杀手不是火灾或吸入浓烟，而是心脏病。

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My heart was thumping wildly but I didn't let my face show any emotion.

我的心在狂跳着，但我没在脸上流露出任何表情。

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We knew all along but didn't have the heart to tell her.

我们一直都知道，但是不忍心告诉她。

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But heart experts say people should seek emergency help immediately.

VOA: special.2009.10.20

But, in this view, God is so powerful and so transcendent that God will know the heart of the worshipper.

但是，在这个观点里，上帝是强大超群的,上帝会知晓崇拜者的心灵。

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So I haven't done magic, I've given you a really fast way to solve a knapsack problem, but it's still exponential deep down in its heart, in something.

所以我并没有施魔法，我已经告诉了你,一种快速解决背包问题的方法了,但是某些方面它的核心仍然是指数增长的。

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But heart attacks can strike even those without traditional risk factors such as high cholesterol levels, suggesting that high viscosity is a possible cause.

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But heart patients frequently experience palpitations that have ended by the time they reach a cardiologist and emailing an on-the-spot EKG reading might help the doctor figure out what happened, said AliveCor co-founder Dr. Dave Albert.

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Others show increases in heart deaths but not heart attacks.

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