"We had a new strain of flu. We did not really know that its lethality was going to be.

VOA: standard.2009.05.03

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

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

"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

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

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

VOA: standard.2010.02.21

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

"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

And a severe strain of dysentery has claimed 30 lives.

VOA: standard.2009.09.14

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

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