流产的风险约为四百分之一。

The risk of miscarriage is about 1 in 400.

youdao

唯一能检测到的杂质是铁，含量只有四百分之一。

The only detectable impurity was iron, and that amounted to only about one-fourth of 1 percent.

youdao

相较之下，英国的少女怀孕率比荷兰高出近百分之四百，而堕胎率会更高。

The UK, by comparison, has a teen pregnancy rate that is nearly 400% higher and a much higher abortion rate.

youdao

Then as you move out to the equity markets where it's harder to price things as efficiently--large-cap stocks -there are two-fold percentage points,first to third quartile.

如果你转而观察,难以有效定价的市场,比如大盘股,第一和第三个四分位数相差2个百分点

耶鲁公开课 - 金融市场课程节选