Incidents range from a nip, which fails to break the skin or draw blood, to serious injuries.

各种情况都有，从并未咬破皮肤或出血的轻伤到重伤。

《柯林斯英汉双解大词典》

A sharp blade is likely to nick the skin and draw blood.

锋利的刀刃可能会划破皮肤，引起出血。

《柯林斯英汉双解大词典》

They were going to draw blood samples from thousands or hundreds of thousands of individuals, and find the genes responsible for disease.

我们从成千上万的个体中取出血液样本，找出引起疾病的基因。

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The plan that I'd worked out with Linda was to take two samples from a cross section of the friends and family in attendance one draw of blood immediately before the vows and one immediately after.

WSJ: The Trust Molecule by Paul J. Zak