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

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

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

"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

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

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