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

这些酶是穿过母细胞保护外层的关键。

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

这些称细胞的外层皮肤细胞实际上已经死亡。

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

睾酮的目标是小中最外层的细胞，称精原细胞。

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

但在此之前，它必须穿过母细胞最外层的颗粒细胞，称辐射日冕。

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，这种蛋白位于T淋巴细胞的细胞膜外层。

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.

当机器人接触湿气时，木材会膨胀， 但内层细胞比外层细胞膨胀得更快，导致其卷曲。

Each follicle is initially made up of an immature sex cell, or primary oocyte, which is the female sex cell, and layers of theca and granulosa cells surrounding the oocyte.

每个泡最初是由未熟的生殖细胞：初级母细胞（即女性生殖细胞）和母细胞外层的鞘细胞、颗粒细胞组。