记住，我提过当我们用二分法的时候,我们假设答案处于,上边界和下边界之间,0。 25的平方根是多少？

Remember, I said when we do a bisection method, we're assuming the answer lies somewhere between Well, what is the square root of a quarter?

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但是我们的调查表明，目前非洲国家只有不到一半的药店和售货亭具备口服补液盐，而锌片在许多地方根本无法获得。

But our surveys show that, at present, ORS is available in less than half of pharmacies and kiosks in African countries and zinc is not available at all in many places.

youdao

事实上，它通常是一个复数的形式，包括普通数字的实数部分和需要乘以负一的平方根的虚部。

In fact, it can generally be a complex number with both a "real" part that's an ordinary number and an "imaginary" part that's multiplied by the square root of one.

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