But the high cost and large fuel cell systems have so far limited use of the technology.

但到目前为止，高成本和大型燃料电池系统限制了该技术的使用。

Stingrays trick cellphones into connecting through them instead of through legal cell systems.

黄貂鱼诱使手机通过它们而不是通过合法的手机系统进行连接。

Well, we used an HIV virus as a Trojan horse to get past the T cells' immune system.

好吧，我们使用HIV病毒作为特洛伊木马来通过T细胞的免疫系统。

Every time a needle penetrates, it causes a wound that alerts the body to begin the inflammatory process, calling immune system cells to the wound site to begin repairing the skin.

针的每一下刺入，都会造成伤口，身体会立即开始对抗炎症的反应并召唤免疫细胞到伤口处修复皮肤。

And muscle cells also have their own version of an endoplasmic reticulum — the cell's transport and storage system — but in this case it's specialized, so it gets a special name: the sarcoplasmic reticulum.

肌肉细胞也有自己的内质网——细胞的运输和储存系统——但在这种情况下，它是专门化的，所以它有一个特殊的名字：肌质网。