The doctor took a urine sample and a blood sample.

医生取了尿样和血样。

《柯林斯英汉双解大词典》

So we will have a test that only requires a blood sample from both my son and me.

日后我们将去做一个测试，只需要儿子和我的血液样本。

youdao

DNA matching usually involves obtaining genetic material from a blood sample or cheek swab.

DNA比对技术往往通过血液样本或者口腔内膜样本来获取DNA。

youdao

Well let's talk about some mechanisms for using this and I'll start with a simple example of how one can detect a gene in a fluid, in a blood sample for example, where that gene is unknown.

我们来说说这项技术在实际应用中的机制,先从一个简单例子着手,如何在一个血样中,侦测是否存在某段基因序列,某段未知基因序列

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The reason it typically takes two days to conduct a blood test and it can take as long as five is that once a nurse takes a blood sample, it must be sent to a central lab where the blood is cultured or amplified in order to let any infections grow and then cleaned.

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