Today, we know human embryos have tails that dissolve as the embryo develops.

今天，我们知道人类胚胎的尾巴会随着胚胎的发育而被溶解。

Before we're born, human embryos develop three different types of kidneys.

在我们出生前，人类胚胎发育出三种同的类肾脏。

Researchers say the embryo models cannot grow into babies.

研究人员表示，胚胎能发育成婴儿。

That's a huge milestone in fetal development.

这是胚胎发育中的重要里程碑。

After nine months, the first baby leaves the pouch, triggering the second embryo to start developing.

九个月后，第一个幼崽离开育儿袋，触发第二个胚胎开始发育。

I was horrified by how many deformed embryos developed in animals that had eaten cesium-contaminated food.

食用污染食物的动物胚胎，其畸形发育数量让我惊骇已。

Fertility specialists now grow embryos longer in the lab and carry out more tests for genetic problems.

生育专家现在延长了胚胎在实验室发育的时间，而且会对遗传问题进行更多测试。

One is to keep the embryo that's developing moist, but it also acts as a shock absorber.

一是保持胚胎发育的湿润环境，但它同样扮演了减震器的功能。

But he added that " the farthest we could get is day 14 in human embryo development."

但他补充说，“我们最多只能做到人类胚胎发育的第 14 天。”

And once this second baby leaves the pouch, the third embryo starts to develop, and the cycle continues.

第二个幼崽一离开育儿袋，第三个胚胎就开始发育，就这样一直循环下去。

Those embryos followed the development of natural mouse embryos up to eight and a half days after fertilization.

这些胚胎在受精后8天半的时间里和自然受精的老鼠胚胎的发育情况一致。

She said the model her group worked with appears similar to embryo development up to 14 days from fertilization.

她说，她的团队研究的看起来类似于受精后14天的胚胎发育。

But they are complete enough to provide information about what happens in the embryo during a pregnancy.

但它们已经足够完整，可以提供有关怀孕期间胚胎发育情况的信息。

Because if the egg gets jarred, you don't want to kill the embryo that's developing by a sudden shock.

因为如果蛋受到冲击，你肯定想因为瞬间的冲击扼杀正在发育的胚胎。

They're protein and fat and calcium...calcium for the bones of the embryo, eventually, calcium for the shell of the egg.

里面有蛋白质，脂肪和钙元素钙元素用于胚胎骨骼的发育到最后，钙质是为了形成蛋壳。

Sozen added that scientists should be able to use the models to study embryonic failure, developmental disorders and pregnancy loss.

索岑补充说，科学家应该能够使用这些来研究胚胎衰竭、发育障碍和妊娠丢失。

One is to shed light on the complicated process of embryological development, which might eventually lead to treatments for some congenital diseases.

一是阐明胚胎发育的复杂过程，这最终可能导向对某些先天性疾病的疗法。

Tagging the human cells with fluorescent markers allowed the researchers to track where in the developing embryo they, and their descendants, went.

用荧光标记物标记人类细胞，研究人员就能够追踪这些细胞及其后代在发育的胚胎中的位置。

This is especially important for research of the early period of embryonic development.

这对于胚胎发育早期的研究尤为重要。

We can see the development of the chick inside the egg of the embryo.

我们可以看到蛋内胚胎的小鸡发育情况。