Each year,scientists work to develop a unique influenza vaccine to protect people against the strain expected in the coming flu season.

VOA: standard.2010.07.21

Now, you don't have to buy that and individuals undoubtedly found the strain too much from time to time, but what's interesting, is rather the ideal, the claim, the theory.

你不必非得接受这些理论,况且现代社会常充斥着个人主义倾向,但是那些理想,主张和理论却更意味深长

耶鲁公开课 - 古希腊历史简介课程节选

So even though he's very closely connected to the legacy of avant-garde modernism, he's also connected to a social realist strain, the naturalist strain.

虽然怀特,与前卫现代主义的传承，有千丝万缕的关联，但他仍具有现实主义。

耶鲁公开课 - 1945年后的美国小说课程节选

"The candidates were feeling the strain and the audience felt a kind of sense of excitement that I would not have anticipated."

VOA: standard.2010.04.22

So, we have a problem here if we're thinking about keeping things at the lowest energy, so there's a lot of ring strain in the system.

现在有个问题,我们考虑要把能量降到最低，所以环上有许多应力。

麻省理工公开课 - 化学原理课程节选

Environmentalists are trying to encourage Sierra Leone's salt producers to use other methods, including drying salt in the sun, to reduce the strain on mangroves.

VOA: standard.2010.03.29

It was found in strain R, a particular strain of E.coli, and it was the first one found, There's a nomenclature that's evolved for this.

酶被发现于R菌株,大肠杆菌中一种特别的菌株,又是被发现的第一种内切酶,有一种专门为此制定的命名法

耶鲁公开课 - 生物医学工程探索课程节选

To slow the spread of the virus and relieve the strain on the country's health system, the government has set up a national pandemic flu service, where people who suspect they're infected can get a diagnosis and prescription for antiviral drugs over the phone or Internet.

VOA: standard.2009.07.31

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

The official number is secret, but news reports say the general wants about The request is controversial, not least because with the U.S.troop level in Iraq expected to remain around its current 120,000 for at least several more months, the strain on the U.S.Army is considerable.

VOA: standard.2009.10.13

"The quality of mercy is not strain'd It droppeth as the gentle rain from heaven Upon the place beneath;

VOA: special.2011.06.06

Meanwhile,expedited efforts are going forward on several continents to develop an effective vaccine for the new strain of influenza.

VOA: standard.2009.04.30

The airing of the controversial program caused outrage in Tel Aviv and is the latest strain on relations between the two countries.

VOA: standard.2009.10.27

Critics say many public health facilities already are under strain and fear more professionals will abandon the public system for private practice.

VOA: standard.2009.12.23

(Speaking) But a study at the University of California Berkeley found that 3-D movies can cause eye strain.

VOA: standard.2010.02.21

But the current swine flu is a new strain to which humans have no immunity and against which existing vaccines offer no protection.

VOA: standard.2009.04.30

Hundreds of millions braved the cold winter weather to travel home to be with their families, putting a great strain on the country's transport system.

VOA: standard.2010.02.14

Mexico has the highest number of deaths and infections of the flu, which is caused by a new strain of the influenza A H1N1 virus.

VOA: standard.2009.05.08

The speed and magnitude of the crisis surprised the government and aid agencies and has put an enormous strain of their ability to provide assistance.

VOA: standard.2009.07.03

"This is a new strain of stem rust organism that has the power to destroy most of the wheat varieties being grown around the world."

VOA: standard.2009.09.16

The growing demand for meat and dairy products is putting particular strain on the environment.

VOA: standard.2010.06.04

It is another strain on the economic life of this country."

VOA: standard.2009.09.05

The flood of people put tremendous strain on their hosts.

VOA: standard.2010.07.16

It's a virulent strain that occurs when a person with TB fails to complete the six to nine-month course of medication or catches TB from another person who is ill with a drug resistant-strain.

VOA: standard.2010.07.12

"The target would be to have this vaccine ready for the fall flu season, so that in addition to being vaccinated for the flu, you would be able to be vaccinated for this strain.

VOA: standard.2009.04.30

This is welcome news for U.S.health officials, who initially had to consider the possibility that the new flu strain's impact could mirror the devastation of the 1918 influenza pandemic that led to tens of millions of deaths worldwide.

VOA: standard.2009.05.03

Since a vast majority of the refugees are Sunni Muslims, Christian leaders fear such a large influx of citizens could tilt the sectarian balance, as well as increase competition in the job market and strain Lebanon's economic resources.

VOA: standard.2010.06.29

I really did. I mean,sure, maybe we could do it again, but it's tough I mean the amount of money time and effort that goes into these things puts a huge strain on the city and the resources, so I hope we go for it again but I think it's hard,".

VOA: standard.2009.10.02