"If we don't ask about sleep and try to improve sleep patterns in kids' struggling academically, then we aren't doing our job," F said.

“如果我们不询问孩子的睡眠情况，不努力改善孩子在刻苦学习时的睡眠模式，那么我们就没有做好自己的工作。”F 说道。

youdao

And that is indeed going to be the curl of F. in practice, if you have to compute the curl of a vector field, you know, don't try to remember this formula.

这就是F的旋度，在实际应用中，如果你必须计算一个向量场的旋度，不要尝试记忆这个公式。

youdao

If you are ambitious, try this alternative procedure: Note that f'(x)involves the Heaviside stepfunction.

如果你有雄心的话，可以用另外步骤试之：注意f’（X）包含亥维塞阶梯函数。

youdao

So input is an int called F, print out to the screen or your piece of paper the value of C. Odds are you only need two, maybe three lines of code for this, but the goal ultimately will be try it on your own.

所以输入是一个int类型的F，在你的屏幕上,或你们的纸上打印出C的数值,可能你们需要两行或者三行的代码,但是最终的目标需要你自己独自尝试。

哈佛公开课 - 计算机科学课程节选

Bezos has recovered enough components to put together two F-1 engines, and historians will try to identify them.

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Given that Russia has already teamed up with India to co-develop and co-produce a version of Moscow's fifth-generation fighter, and that China is co-developing with Pakistan a very low-cost fourth-generation fighter, the U.S. may decide to try and protect market share and lift an export ban on F-22s.

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DON'T GROUND THIS HIGHFLIER THE HOUSE OF REPRESENTATIVES has canceled production of the proposed new F-22 fighter aircraft. (The Senate may try to revive it.) Six of these planes were slated to be built next year.

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