For example, the language part of the brain develops when a person is very young.

例如，在人们小时候，大脑语言部分就会开始发育。

That's when neurodevelopment begins, when the brain starts developing.

这时神经发育开始，大脑开始发育。

Then groups of heavy, eight-to- twelve-centimeter-long fruits that look like mangoes start to develop.

然后，一簇簇看起来像芒果水果开始发育，它们很重、有8到12厘米长。

The disruption in hormones prevents puberty from beginning or successfully completing.

激素中断阻止了青春期发育开始或完成。

Researchers think the embryo only re-starts its development after the female returns to lower elevations and can eat more of the calcium-rich leaves of arrow bamboo -- nutrients she needs for fetal bone growth and lactation.

研究员认为，胚胎只有在雌性熊猫回到海拔较低地区后才会重新开始发育，在这些地区还能够吃到更多——这是胎儿骨骼生长和母亲哺乳所需营养物质。

She told The Associated Press, " If we can experimentally model this period, then we can finally start asking questions about how human development happens in those very early stages that are normally hidden within the body of the mother."

“如果我们能通过实验模拟这一时期，那么我们最终就可以开始询问人类发育在通常隐藏在母亲体内早期阶段是如何发生。”

We always thought that Coby was so cute when we first met him, as a kitten, but as he's gotten older, pretty early on, he started developing this, we call it guy-liner.

当我们第一次见到科比时候，他还是是一只小猫咪，我们就觉得他是那么可爱，随着他渐渐长大，很早时候就开始了，他开始发育，我们称作" 小伙子线条" 。

Unlike men, who manufacture sperm throughout their post-pubertal lives, albeit in ever-decreasing quantities, all of a woman's potential eggs develop while she is still a fetus.

而男性则不同。虽然男性制造精子数量会不断减少，但他们在青春期后始终都在制造精子；而女性所有卵子都是在胎儿时期开始发育。

The team then genetically changed the cells in an effort to get them to start developing into something that looks and behaves like a real human embryo.

然后，该研究团队对这些细胞进行了基因改造，以使它们开始发育成形态像真正人类胚胎东西。

And the third trimester starts at 28 weeks – that is the time when the fetus's weight increases and the organs begin to grow.

第三个妊娠期从28周开始，胎儿体重增加，器官开始发育。

Then, after two days, a little chick will begin to form inside the egg, just on the top of the yolk.

经过两天之后, 一只小鸡就会在鸡蛋之中展露雏形, 从蛋黄顶部开始发育。

The caterpillar doesn't really start forming or developing until that egg is laid, and then the clock really starts ticking.

毛毛虫直到产卵才真正开始形成或发育，然后时间开始推移。

Around 7 weeks the male sex organs start to develop because of a gene on 'Y' chromosome called 'SRY'.

大约7周左右，男性性器官开始发育，这是由于“Y”染色体上有一种叫做“SRY”基因。

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。

There, the early spring weather can be too warm and the grapes begin to develop before they should.

在那里，早春天气可能太温暖，葡萄提前开始发育。

Later in pregnancy, probably around 28 weeks, the fetal auditory system really starts forming so they can start to hear.

在怀孕后期，大约 28 周左右，胎儿听觉系统开始真正发育，因此他们可以开始听到声音。

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。

The sperm and the egg, basically they come together, and then they start developing.

精子和卵子基本上结合在一起，然后开始发育。

The whole thing increases in size, and bundles of cells start developing into support structures.

整个结构增大，细胞束开始发育成支撑结构。

At that time, I really started developing really under eye bags.

那时，我真开始在眼袋下发育。