This is the lung of a patient with a long history of intravenous drug use.

这是一个长期静脉内用药的病人的肺。

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The problem with this, Thomashow says, is that the lung damage that constitutes COPD can't be reversed; all you can do is halt or slow the progression of the disease.

托马斯休说：这里的问题是，造成COPD的肺部损害是不可逆转的；你所能做的就是延缓或者停止疾病的进行性加重。

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But what is more curious is this: the retrovirus is closely related to a free-living virus called Jaagsiekte sheep retrovirus, which causes lung cancer in sheep and goats, but not other species.

不过更奇怪的是：这种逆转录病毒与一种游离生活的绵羊肺腺瘤逆转录病毒(可以引起绵羊和山羊患肺癌)而不是其它种更加接近。

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This particular one down here, this portion here is a heart/lung machine and this is a machine that can take over the function of a patient's heart and lungs during the period when they're undergoing open heart surgery, for example.

下面这是一个特别的设备,这一块是,心肺机,这台机器能够,在病人接受心脏手术的时候,替代病人的,心脏和肺的功能

耶鲁公开课 - 生物医学工程探索课程节选

This is essential to keep me breathing when the iron lung is opened for nursing.

CNN: 'I lived in an iron lung for seven years'

There are others, but if we look at the one that is most pervasive and causes the largest number of disease in this country, lung cancer is rising and it's rising because we have not been able to get this cancer-causing agent off the street.

CNN: Debaters Agree Cancer War Should Stress Prevention

But what is more curious is this: the retrovirus is closely related to a free-living virus called Jaagsiekte sheep retrovirus, which causes lung cancer in sheep and goats, but not other species.

ECONOMIST: A virus has been subverted into helping its host