66.do you have righ-hand or left-hand propeller ?

我们船在推时进时螺桨是右还是左？

Many contain other legal stimulants like taurine, guarana and L-carnitine.

许多含有其他合法兴奋剂，如牛磺酸、瓜拉纳和左碱。

Some vegetarian volunteers, given carnitine pills but spared the steak, showed similar results.

有些素食志愿者在服用左碱药片却未食用牛排后，表现出了类似的结果。

On entering Yonville she made her horse prance in the road. People looked at her from the windows.

一走上荣镇的，她就调动马头，左右转。 大家都在窗口看她。

Acetyl-L-Carnitine, or ALCAR, claimed to provide cognitive preservation in the elderly as well as provide potential anti-aging properties.

乙酰左碱，或称 ALCAR，这种物声称能保护老年人的认知能力，并具有潜在的抗衰老特性。

There's Glycine Propionyl L-Carnitine, aka GPLC, suggested that, in high dosages, improves blood pressure via increased nitric oxide production.

甘氨酸丙酰左碱 (GPLC) 表明，高剂量可以通过增加一氧化氮的产生来改善血压。

That suggests the vegan's particular gut flora—adapted to his usual meat-free diet—did not contain species that can digest carnitine.

这表明素食者特殊的肠道菌群――适应了他的无饮食――不含有可消化左碱的种类。

The mismatch in question revolves around a molecule called carnitine.

疑问的焦点集中于一种称为左碱的分子。

The principal difference they found turned out to be levels of L-DOPA.

他们发现的主要区别在于左多巴的水平。

L-DOPA permitted victims to awaken, though only for a while.

左多巴可以让受害者苏醒，尽管只是暂时的。

That does not absolve cholesterol of blame—on the contrary, carnitine boosts cholesterol's pernicious effect.

这并未免除了胆固醇的罪责，恰恰相反，左碱大大助长了胆固醇的害处。

He found there was indeed an association between heart disease and carnitine, but only when TMAO levels were also high.

他发现，心脏疾病与左碱确有关联，但只有高TMAO水平时才会发生。

One of the biggest problems Levodopa faces on it's own is peripheral metabolism.

左多巴自身面临的最大问题之一是外周代谢。

This diet resulted in high levels of both carnitine and TMAO in the volunteers' blood.

该食谱使得志愿者血液中的左碱和TMAO都处在高水平。

I started him on IV steroids and ancinthroid.

我在给他用I.V.类固醇和 Synthroid(一种左甲状腺素钠制剂).

Alright the next dopamine-directed class of therapies are inhibitors of COMT, catecholamine-O-methyltransferase, which is an enzyme that degrades dopamine and levodopa.

下一个针对多巴胺的治疗药物是COMT抑制剂；COMT，即儿茶酚胺-O-甲基转移酶，是一种可以降解多巴胺和左多巴的酶。

This is exactly why levodopa is administered with carbidopa, a dopa decarboxylase inhibitor that isn't able to cross the blood-brain barrier.

这也就是左多巴要和卡比多巴共用的原因；卡比多巴是一种不能通过血脑屏障的多巴脱羧酶抑制剂。

First, with the help of enzyme tyrosine hydroxylase (TH), tyrosine gets converted to L-dopa, also known as levodopa.

首先，在酪氨酸羟化酶（TH）的帮助下，酪氨酸也转化为左多巴被称为左多巴。

Now, Levodopa is carried across blood-brain barrier by amino acid transporter.

现在，左多巴通过氨基酸转运体穿过血脑屏障。

So the other thing about TMAO to know is that certain types of gut bacteria metabolize choline and carnitine into TMAO whereas others don't.

另外需要了解的是，某些肠道菌群可将胆碱和左碱代谢成氧化三甲胺，另一些肠道菌群则不能。