The targets of the testosterone are the outermost cells in the tubules, called spermatogonia.

睾酮的目标是小管中最层的细，为精原细。

Ipilimumab locks onto and thus blocks the action of a protein, CTLA-4, which sits on the outer membranes of immune-system cells called T-lymphocytes.

易普利姆玛锁定并抑制CTLA-4的活动，种蛋白位于T淋巴细的细层。

Those enzymes are the key to getting through the oocyte's protective outer layers.

酶是穿过卵母细保护层的关键。

But before that it has to weave through the granulosa cells that form the oocyte's outermost layer, known as the corona radiata.

但在此前，它必须穿过形成卵母细最层的颗粒细，为辐射日冕。

These outer-layer skin cells, which are called corneocytes, are actually already dead.

为角质细的层皮肤细实际上已经死亡。

And cells from the outer layer of this blastocyst are called trophoblasts.

而个囊胚层的细被为滋养层细。

The outer cell then sheds its  water and kills itself, leaving the spore to float around, maybe for thousands of years until  it finds a good place to spring to life again.

层细然后会排出水分并自我毁灭，留下内生孢子四处漂浮， 可能长达数千年， 直到找到一个合适的地方重新发芽生长。

I don't want to tempt you too much, but the porous grains are packed with beef muscle and fat cells grown in the lab, then coated in fish gelatin.

我不想过分诱惑你， 但多孔颗粒内充满了在实验室培养的牛肉肌和脂肪细，层还裹着鱼胶。

When the robot comes in contact with moisture, the wood expands, but the inner layer cells do it faster than the outer layer, causing it to coil.

当机器人接触到水分时，木材会膨胀， 但内层细比层细膨胀得更快，导致其卷曲。