Except for cancer, samples of diseased tissue are difficult or even impossible to take from living patients.

除了癌症以外，许多病变组织的样本很难或是根本不可能从存活着的患者那里获得。

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So if a scientist wanted to study the microorganisms living on each side of a temperature gradient, the AUV would find the boundary, follow it, and pick the best spot to take samples.

因此，当一位科学家有兴趣研究生活在海平面下某一温度层边缘的微生物，这台水下自动探测机器人能够找到温度梯度的边界，并在那里找到最佳样本。

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Blood samples showed that the CETP gene, already known to treble-the odds of living to 100, also cut the odds of dementia by 70 per cent.

血液采样显示，除了人们已知可以将活到百岁的几率提高两倍以外，CETP基因还能把痴呆症的病发几率减少70%。

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Following the study, Puerto Ricans from across the island and many living on the mainland had their DNA tested by submitting samples of their saliva.

VOA: standard.2010.04.05

Tissue samples from living and post-mortem cases involving severe tissue infection should receive additional treatment.

BBC: Killer heroin report published

Police forces have been given lists of offenders living in their areas and will work though them to collect the samples.

BBC: A DNA autoradiogram

The FBI removed evidence including DNA samples from the house where the widow of suspected Boston Marathon bomber Tamerlan Tsarnaev has been living.

BBC: Tsarnaev widow's family home searched by FBI