T he function of filters in a hydraulic system is to maintain fluid cleanliness.

液压系统中过滤器作用是维持流体的清洁度。

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Unlike the drugs used in HAART which target the virus, minocycline homes in on, and adjusts t cells, major immune system agents and targets of HIV infection.

HAART以病毒本身为靶子，与这种疗法使用的药物有所不同的是，二甲胺四环素采取的是导向目标追踪方式，调节免疫系统的主要行动者以及HIV感染目标T细胞。

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So the idea is to spur other soldiers of the immune system called t cells to quickly kill the infected cells before they could make new viruses. That would limit disease severity.

因此，新的想法就是刺激免疫系统中的T淋巴细胞，让它迅速杀死受到感染的细胞，使之来不及生成新的病毒，以此限制病情恶化。

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Venezuelan President Chavez said in Moscow Sunday he had obtained a $2.2-billion line of credit from Russia for 90 T-72 tanks and an advanced long-range air defense system.

VOA: standard.2009.09.15

And this is very important, because the Romans, as their power grew in the East, they simply moved increasingly into the eastern Mediterranean and they adopted the whole Greek system, the Greek world, and they didn't even try to make it non-Greek.

这点非常重要，因为随着罗马人的势力在东方日渐壮大，他们不断朝地中海东部推进,并采取了全套希腊系统，希腊世界，甚至没有作出任何非希腊式的改变。

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People say we don't--well, we don't, but we do have an emergency care system so that anybody who is suddenly stricken will be taken to a hospital and taken care of.

人们说没有，好吧，那就没有，但我们确实有急救护理制度,让突然受伤的人,可以被送往医院并且得到救护。

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For reasons that are not yet clear, when the T-cell-presenting system is reactivated by the gradual disappearance of the antibodies, it no longer seems to perceive the transplanted tissue as foreign.

ECONOMIST: Breaching the body's defences

The T-shaped system first swept across the nation's midsection Wednesday night and pummeled portions of Missouri, where the National Weather Service said Thursday that an EF-2 tornado appears to have damaged dozens of homes in the St.

NPR: Severe Storms Sock Midwest, Push East; 2 Dead

At each Performance Lab, TaylorMade stocks an array of interchangeable heads and shafts, and they immediately configure clubs based on the specs recommended by the MAT-T system for you to try on an outdoor range and validate.

FORBES: Take Strokes Off Your Golf Game Today - The Best Way To Buy New Clubs