Ruhli notes researchers used that technique to study the evolution of the tuberculosis bacteria from 2,000-year-old mummified tissue to modern-day strains.

VOA: standard.2010.05.05

It's a common bacterium and most strains of E. Coli are not harmful to people, in fact, they provide us with some beneficial properties.

它是常见菌,且大多数种类的菌株对人类无害,实际上还给了我们颇多裨益

耶鲁公开课 - 生物医学工程探索课程节选

He's connected to both those strains as well as the modernist strain.

怀特同时具备两种特征,但我先不去区分。

耶鲁公开课 - 1945年后的美国小说课程节选

Jackson says having one genome in hand will make it easier to spot useful genetic variations in other strains.

VOA: standard.2010.02.01

He eased some of the strains on the poor.

缓解了穷人的压力。

耶鲁公开课 - 新约课程节选

A combination vaccine, using strains of HIV common in Thailand,was tested on Thai men and women aged 18 to 30 years old, who were HIV-negative.

VOA: standard.2009.10.20

But think of what are strains of this on him.

但是想想学他的那些人。

麻省理工公开课 - 电影哲学课程节选

When they listen to his mazurkas and polonaises, they hear not only the strains of Polish folk music, but also nostalgia and patriotism for his homeland.

VOA: standard.2010.03.04

There is a whole mystical objectification of these people that's going on, that's allied to the religious strains of this novel, which I'm going to pick up again a little bit later on in my lecture today.

在此有将这些人的神秘感对象化，客体化，这也为小说增添了一些宗教色彩,关于这一点我还会在今天课堂的后部分中提到。

耶鲁公开课 - 1945年后的美国小说课程节选

The discovery should dramatically speed up the process of breeding better strains.

VOA: standard.2010.02.01

The growing strains stem largely from Ankara's increasing criticism of Israel's occupation of Palestinian territory, and more recently, Ankara' canceled joint military exercises with Israel scheduled for later this month.

VOA: standard.2009.10.27

In a number of races around the country, strains are developing between some traditional Republican candidates and more conservative politicians who want to return the party to what they believe are its more conservative roots.

VOA: standard.2010.05.04

Other infectious disease experts,however, have insisted Australia's is over-reacting to the outbreak of the A-H1N1 virus, insisting that,so far, the disease is no worse than other strains of influenza that kill hundreds of Australians every year during the colder winter months.

VOA: standard.2009.05.30

At the same hearing, he says in one of the best studies used molecular fingerprinting to follow an outbreak of drug-resistant bacteria: "You actually can trace the specific bacteria around and they find that the resistant strains in humans match the resistant strains in the animals."

VOA: standard.2010.07.21

Some want an independent review. And the trial's researchers, like Dr.Nelson Michael, of the Walter Reed Institute of Research in the United States, say it's unclear what difference the findings will make for areas like Africa where rates of HIV/AIDS are much higher than among the test population and where there are many strains of the virus.

VOA: standard.2009.10.20