Could you explain why you take samples of the blood from the patient?

你能解释一下你为什么抽取病人的血样吗？

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He visited Guangdong, the Chinese province where SARS was first found, from October to December of that year to take samples at animal markets there.

他造访了首先发现严重急性呼吸道综合征的中国广东省，从2003年10月到12月，在当地动物集市采集样本。

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The latter tests take samples of genetic material from the foetus but they carry a 1% risk of miscarriage and are therefore reserved for high risk pregnancies.

绒毛取样需要从胚胎中取出遗传物质样本，有百分之一的可能导致流产，所以一般只有在胎儿患病风险很高的情况下才会使用。

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His newest tree ring samples, from southern Vietnam, enabled him to take the climate record back much further.

VOA: standard.2010.04.05

The three-month Catlin Arctic Survey expedition will also take samples of the water, snow, ice and air.

BBC: Polar survey team start journey

The bill would set strict standards and then give state inspectors summary powers to board the ships to take samples.

ECONOMIST: Black water, did you say?

The team will now take samples to verify the date of the enclosure, before re-burying the site, in line with national guidelines.

BBC: Truro experts uncover '6000-year-old' causeway