In the United States, 12% of all live births in 2010 were preterm.

美国方面，2010年活产婴儿中早产儿所占的比率高达12%。

The maternal mortality rate has dropped to 18 per 100-thousand live births last year.

全国孕产妇死亡率下降到18.3／10万。”

That would mean that over nine babies' lives are saved for every 1,000 live births.

那意味着，在每1000 位新生儿中，有超过 9 名婴儿的生命被挽救回来。

The first woman to have a live birth from a transplanted womb had a baby boy last month in Sweden.

第一位接受子宫移植手术的妇女上个月在瑞典生了个男孩。

In Cambodia, the maternal mortality rate is 170 deaths for every 100,000 live births.

在柬埔寨，孕产妇死亡率为每 100, 000 名活产婴儿中就有 170 人死亡。

Twenty-five years ago, Tung Raththavy explained, Cambodia had 900 deaths for 100,000 live births.

25 年前， Tung Raththavy 解释说， 柬埔寨有 900 人死亡， 每 100, 000 人活产。

And, again, the result paralleled the general population: 86 percent of pregnancies resulted in live births.

而且，结果再次与一般人群相似：86% 的怀孕导致活产。

Okay, so boas and pythons are both constrictors they're both snakes, they're both reptiles, but boas have live birth and pythons lay eggs.

好吧，蚺蛇和蟒蛇都是蟒，它们都是爬行动物，但是蟒蛇有活产，蚺蛇产卵。

One is a straight birth rate: in a given year, how many live births are there for every thousand people?

一是直接出生率：在某一年，每千人有多少活产？

But at some point, mammals, as well as some reptiles, took this a step further with the ability to give live birth.

但在某些时候，哺乳动物以及一些爬行动物在这方面更进了一步，具有活产的能力。