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，以防止电波泄漏。

When you pull a sword out of a sheath, it shouldn't have that sound.

- 当你从剑鞘中拔出剑时，它不应该发出那种声音。

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。

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

埃伯斯，你现在有一些鞘。

Back in the stern he turned so that his left hand held the strain of the line across his shoulders and drew his knife from its sheath with his right hand.

回到船梢，他转身让左手攥住紧勒在肩上钓索，右手从刀鞘中拔出刀子。

This forms what's called the rectus sheath.

这就形成所谓直肌鞘。

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

开始他担心宝剑会锈在剑鞘里拔不出来。

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，是在电光熔炉中行驶。

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

毒牙全被护鞘盖着。

Her neck, rising from the black taffeta sheath of her basque, was creamy-skinned, rounded and slender, and it seemed always tilted slightly backward by the weight of her luxuriant hair in its net at the back of her head.

她那奶酪色脖颈圆圆，细细，从紧身上衣黑绸圆领中端端正正地伸出来，但由于脑后那把戴着网套丰盈秀发颇为浓重，便常常显得略后向仰。

The hilt of the sword was of gold and it had a sheath and a sword belt and everything it needed, and it was just the right size and weight for Peter to use.

剑柄是金铸，还配有剑鞘佩剑带，以及一切剑必备东西，而且剑尺寸重量对彼得也正合适。

As a result, immune cells mistakenly attack and destroy the myelin sheath and this is called molecular mimicry, because from the perspective of the immune cells a host substance is mimicking a foreign protein.

因此，免疫细胞会错误地攻击、损伤髓鞘；由于自身物质细胞外来蛋白具有相似抗原表位而导致免疫细胞攻击自身，被称为分子模拟。

They're kept out of harm's way within these protective sheaths, but when he needs to use them, the Mega Lion would swing them into action, like switch-blade knives, and could slice up prey.

它们缩回到保护性鞘膜内时不会受到损坏，不过当拟狮要使它们时，就会把它们探出来，就像弹簧折刀一样，还能切开猎物。

The professor was still onstage, taking questions from the audience, and speculating about how the knife sheath found at the scene with the suspect's DNA on it might be considered at trial.

教授仍在台上，回答观众问题，猜测在现场发现带有嫌疑人DNA刀鞘可能会在审判时被如何看待。

It had punctured the carotid sheath but didn't appear to have damaged the hypoglossal nerve or the vagus nerve, which control tongue function, the swallow reflex, and the voice box.

它刺穿颈动脉鞘，但似乎没有损伤舌下神经或迷走神经，它们控制着舌头功能，吞咽反射喉部。

He hated Pip for a poltroon. Snatching the boat-knife from its sheath, he suspended its sharp edge over the line, and turning towards Stubb, exclaimed interrogatively, " Cut? "

他厌恶皮普是个胆小鬼。他从鞘里拔出水手刀，把锋利刀刃搁在捕鲸索上，转头冲着斯塔布，大声问道：“割吗？”

That's why every muscle contains a few different kinds of supportive sheaths of connective tissue -- the protective reinforcements to keep that bulging muscle from bursting.

这就是为什么每一块肌肉都包含几种不同类型结缔组织支持鞘——保护增强物，以防止膨胀肌肉爆裂。

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光滑，并相当于增加一层润滑保护防护套，可以让你头发保持健康。

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

猫在不爪子时候, 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”。

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

原来在我超级方便绣珠梳套里，那可是我在卢克超棒生日派对上做哟。