Myelin is a fatty sheath that insulates an axon, preventing electrical currents from leaking out.

髓鞘质是一种脂肪鞘，它把轴突隔绝起来，以防止波泄漏。

So Ebbers, you've now got shallot tips and a couple of the sheaths.

埃伯斯，现有了葱尖和一些葱鞘。

This forms what's called the rectus sheath.

这就形成了所谓直肌鞘。

He was afraid at first that it might be rusty and stick to the sheath.

开始他担心宝剑会锈剑鞘里拔不出来。

Swept along by its propeller, the Nautilus was traveling through a sheath of flashing light.

诺第留斯号受它帆轮推动，是熔炉中行驶了。

Try a sheath dress in navy, brown, charcoal, or red, too. Just make sure it's a solid color.

也可以尝试一下藏青色，棕色，木炭色或红色。但是要确保是纯色。

And to make matters worse, that body amour was covered in a protective sheath of keratin.

雪上加霜是，个体甲上覆盖着保护性角质鞘。

The coating smoothes them down and adds a lubricating and protective sheath to keep your hair feeling healthy.

这种涂层可以使头发变得滑，并相当于增加了一层润滑和保护防护套，可以头发保持健康。

Uranium fuel rods contain tiny pellets of specially prepared uranium encased in a sheath of zirconium alloy.

铀燃料棒含有若干微型特制铀芯块，这些芯块被包裹锆合金护套里。

An unsealed affidavit says DNA matches Bryan Kohberger to a knife sheath found at the crime scene.

一份公开宣誓书显示，布莱恩·科伯格DNA与犯罪现场发现刀套上DNA相符。

Myelin is the protective sheath that surrounds the axons of neurons, allowing them to quickly send electrical impulses.

髓磷脂是神经轴突周围保护性鞘膜，能快速传导神经冲动。

The cat has sheaths or cases into which it draws back its claws when they are not wanted.

猫不用爪子时候, 可以把爪子缩回到“爪鞘”或者“爪套”里面, 这个部分学名是“球套”。

How could you not? You combined the two things that kids love the most- combs and sheaths. I'm kidding!

怎么可能不愉快呢？把孩子们最爱两样东西结合到了一起——梳子和套子。我开玩笑！

Hey, Luke. Look. Do you wanna make a comb sheath?

嘿，卢克。瞧啊。想做个梳套吗？

They're probably covered by the white sheaths. We'll just give it a go and see. Ha!

毒牙上会有白色护鞘，我们来看看，哈！

There you are, the snake's fangs are covered by the sheaths.

毒牙全被护鞘盖着。

Here it is in my incredibly convenient beaded comb sheath...that I made at Luke's awesome birthday party.

原来我超级方便绣珠梳套里，可是我卢克超棒生日派对上做哟。

STEP 1 Invest in what fashionistas call the LBD, or Little Black Dress: A simple, elegant sheath.

投资购买一条小黑裙，时尚达人称为LBD：选择简单优雅紧身款。

In particular, as you reach old age, the myelin sheath covering your axons wears down, and other neuronal structures degrade.

特别是，当年纪大了以后，包裹轴突髓鞘质会发生磨损，其它神经元结构也会衰退。

Within the chameleon's mouth, a tongue muscle squeezes a series of concentric sheaths around a cartilaginous rod, storing elastic energy.

变色龙口腔中，舌肌紧缩软骨棒周围舌鞘，储存弹性能量。