我交换了分子和分母，因为这里有个负号。

And I've reversed the fraction here because of the negative sign here.

youdao

从分数的分子和分母中去掉相同的因数，我们称为约分。

We call it reduction to remove the same factors from the terms of a fraction.

youdao

另外，借助于间接估计指标分子和分母置信区间的办法，克服了估计指标置信区间的困难。

In addition, the difficulty of estimating the index credible interval was overcome by an indirect method which estimated the credible intervals for the numerator and denominator of the index.

youdao

If they both go up by the same proportion, then numerator and denominator go up by the same amount, so there's no change.

如果大家都上升了相同幅度,分子和分母同比例增大,则没有变化

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And I've reversed the fraction here because of the negative sign here.

我交换了分子和分母,因为这里有个负号。

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