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

这时神经发开始，大脑开始发。

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

例如，在人们小时候，大脑的语言部分就会开始发。

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

在那里，早春的天气可能太温暖，葡萄提前开始发。

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

九个后，第一个幼崽离开，触发第二个胚胎开始发。

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

然后，一簇簇看起来像果的水果开始发，它们很重、有8到12厘米长。

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，第三个胚胎就开始发，就这样一直循环下去。

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，这是由于“Y”染色体上有一种叫做“SRY”的基因。

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

激素的中断阻止了青春期发开始或完成。

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

整个体积变大，细胞束开始发成支撑结构。

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

精子和卵子基本上结在一起，然后开始发。

Girls develop breasts and their  bodies become able to have babies.

女孩的乳房开始发，她们的身体开始具备生能力。

The womb represents the very first place in which life takes form.

【form】子宫就是生命开始发的地方。

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。

And listen, I started off in neural development.

听着, 我开始神经发。

Around 24 weeks in, the lung structures that swap out oxygen and carbon dioxide, called alveoli, start developing.

大约 24 周后，交换氧气和二氧化碳的肺部结构（称为肺泡）开始发。

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，胎的听觉系统开始真正发，因此他们可以开始听到声音。

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

那时，我真的开始在眼下发。

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，然后时间开始推移。

Upon successful fertilization, the zygote immediately begins developing into an embryo, and takes about three days to reach the uterus.

受精成功后，受精卵立即开始发成胚胎，大约需要三天才能到达子宫。

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，胎体重增加，器官开始发。