The issue has previously strained bilateral relations.

该问题之前曾一度让双边关系紧张。

I realize there are different strains of Ebola.

我发现埃博拉病毒也有很多。

Carrie, you're under a lot of strain.

卡莉 你压力太大了。

And that does put a strain on immigration enforcement.

这给移民执法造成了压力。

But there are some strains that can get you sick.

但是有些菌株会让你生病。

But even good bacteria like E-coli can develop deadly strains.

但即使是像大肠杆菌这样的好细菌，也能产生致命的菌株。

Hartuv says the uncertainty places many strains on a family.

哈特威表示不定性为一个家庭造成许多压力。

I cannot afford to throw any extra strain upon it.

我再不能摧残它了。

'Well, he certainly must have strained himself to get this menagerie together.'

" 我说，他一定花了很大的气力才搜罗到这么一大帮牛头马面。"

Relations between the United States and Venezuela have been strained for years.

多年来，美和委内瑞拉两的关系一直十分紧张。

Nicotine narrows your blood vessels and puts added strain on your heart.

尼古丁可缩小血管宽度，增加心脏负荷。

E.coli is a particularly-the strains of it is a particularly nasty player.

大肠杆菌是菌株家族中一特别的尤其令人生厌的菌株。

But the large number of refugees is placing a strain on Egypt's resources.

但是，大量难民给埃及的资源带来了压力。

Emerging markets have handled the economic strains of the past 18 months with fortitude.

过去18个月里，新兴市场顽强地应对了经济压力。

His Christmas habit is putting a strain on more than just his wallet.

他每天庆祝圣诞节的嗜好不只是让他经济拮据。

" It's a nice yellow one, " said Wilson, as he strained at the handle.

" 好漂亮的黄车。" 威尔逊说，一面费劲地打着油。

You can get the motion down and then it puts less strain on your back.

你可以减少运动量，这样可以减少对背部的压力。

Sometimes other strains of the virus spread more than expected.

因为有时候意料之外的流感会流行开来。

Sir, I can stand this strain no longer; I shall go mad if it continues.

先生，这么紧张我再也受不了啦，这样下去我会发疯的。

The US - South Korea alliance has been strained under Trump.

事实上，美韩联盟在特朗普的压力下一直处于紧张状态。