科学家正在不断加深对睡眠的研究，他们对其中的一件事实确信无疑：对于人类来说，睡眠与食物和水一样重要。

Scientists are continually learning more about sleep, but one thing they know for sure is this—for humans, it is as important as food and water.

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因此，如果对超对称性确信无疑，那么宇宙空间中元素同位素的存在就会比标准模式预测的要少。

So if supersymmetry is true, there should be less of this isotope around than the Standard Model predicts.

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如果你做了一个你确信无疑自己可以达到的承诺——或者更好、更优秀地达成这个承诺——你将为许多未来的成功和成长打下基础。

If you make a commitment that you know without a doubt you can keep-or even better, exceed-you will build a foundation for many future successes and growth.

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