At the same time, they videotaped the faces of each of the babies during and after the blood draw.

同时，他们将每个孩子抽血中和抽血后的面部表情录了下来。

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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》

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