We don't permit their magnesium-calcium ratio to fall below what it was at thirty.

我们不让他们的镁钙比值降低到三十岁时以下。

Urine protein-to-creatinine ratio, with serum creatinine, can give insight into the kidney's condition.

尿蛋白与肌酐比值以及血清肌酐可以帮助了解肾。

The count was 325 to 306.

比值是325比306。

For the whole lot, the median revenue growth was 63% and the value-to-revenue ratio was 22.

整体而言，营收增长中值为63%，估值与营收比值为22。

In fact, each additional x chromosome increases the estrogen to testosterone ratio, making the changes even more striking.

事实上，每多一条X染色体，雌激素与睾酮的比值就会变大一些，Klinefelter综合征的病征也会明显一些。

So, we'll set up our equivalent ratio as x tonnes of ore compared to 60 ounces of gold.

所以我们设定相应的比率为 x 吨矿石与 60 盎司黄金的比值。

This group has a median revenue growth of 32% and valuations 25 times their annual sales.

这类企业的营收增长中值为32%，估值与年销售额的比值为25。

And if the ratio of the electro magnetic force to the strong force wasn't one percent, life wouldn't exist.

而且磁力与强作用力的比值不是百分之一的话，生命就不会存在了。

These firms have a median valuation of 28 times their sales and revenue growth of 33%.

这些公司的估值中值与其销售额的比值为28，营收增长为33%。

This is the quotient of a structure's demands and its strength.

这是结构需求与其强度的比值。

The ratio of these two numbers indicates there's  plenty of dark matter inside this galaxy.

这两个数字的比值表明，这个星系内部存在着大量的暗物质。

For the ramp, you look at the ratio of the length to the height.

对于斜面，你观察的是长度与高度的比值。

The pound has strengthened against other currencies.

【strengthen】英镑对其他货币的比值上升了。

It's the ratio of the weight of the bunch to its morphological volume.

它是束的重量与其形态体积的比值。

And so at the beginning the rise over the run is 0 meters per second.

所以在开始时，位移与时间的比值是0米每秒。

The critical variable was the standard deviation of the means divided by the mean of the standard deviations.

关键变量是均值的标准差除以标准差均值所得的比值。

And all that is is simply a ratio between the material's magnetic permeability and that of free space.

而这仅仅是材料的磁导率与自由空间的磁导率之间的比值。

And so if we were to put a ratio between those two it would be a ratio of 1.

我们在这两个量之间做一个比值，那么这个比值就是1。

That's right, March 14th, or 3.14, the day we celebrate the fascinating mathematical constant Pi, the ratio of a circle's circumference to its diameter.

没错，3月14日，也就是3.14，是我们庆祝迷人的数学常数圆周率的日子，这是圆的周长与直径的比值。

And then I'll show you the surface area to volume of a side when it has a side area of one.

然后我会展示当一个边具有单位面积时，其表面积与体积的比值。