The moon was around before the first cells divided.

在第一个细胞分裂前，月亮这颗卫星就已经存在。

The healthy hair cell divides frequently.

健康的毛发细胞分裂频繁。

Fortunately, 96 million cells divide, replacing those lost.

幸运的是，9600万个细胞将进行分裂，可以替换掉那些丢失的细胞。

And the cancer cell divides even more frequently and recklessly.

而癌细胞分裂得 更加频繁也更不受限制。

As the cells divide, some genes are activated and others inhibited.

当细胞开始分裂，一些基因被激活其他的被抑制。

During meiosis, one cell divides twice to form four daughter cells.

在减数分裂过程中，一个细胞分裂两次，形成四个子细胞。

Mitosis produces identical copies of cells and is how most of our cells divide.

有丝分裂产生相同的细胞，这是我们大多数细胞分裂的方式。

When cells divide by mitosis, the number of cells increases, and hence the organism grows.

当细胞通过有丝分裂分裂时，细胞数量增加，因此生物体生长。

As prostate cancer cells divide, they release certain organic compounds that dogs can smell.

当前列腺癌细胞分裂时候会释放狗狗能闻到的某些有机化合物。

Then that cell divides and we are two cells, then four, then eight.

随后，这个细胞分裂成两个、然后四个、接着八个。

And while men do continually make new sperm, the more cell divides the higher probability of genetic mutations.

虽然男性不断产生新的精子，但细胞分裂越多，发生基因突变的可能性就越大。

Mutations are small changes in DNA that can happen when a cell divides in an attempt to copy itself.

突变是细胞分裂试图复制时，可能发生的DNA的微小变化。

These can occur when DNA replicates, either when a baby is conceived or as cells divide during our lives.

这些可能发生在DNA复制的时候，或者是怀孕的时候，或者是在我们的生命中细胞分裂的时候。

Each time cells divide, there is a chance of a mutation and the possibility of tumor formation.

细胞每分裂一次，就有突变和形成肿瘤的机会。

Skin cells divide and cover the wound.

皮肤细胞分裂并覆盖伤口。

Most telomeres shrink every time their cell divides.

大多数端粒在每次细胞分裂时都会收缩。

Cells divide, and nine months later, joy is bundled.

细胞分裂，九个月后，喜悦被捆绑。

It was important when cells divide.

细胞分裂时很重要。

When these early cells divide, each passes on its X inactivation.

当这些早期细胞分裂时，每个细胞都会传递其 X 失活。

Who cares how a cell divides? It just does.

谁关心细胞怎么分裂 就那么分裂了呗。