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。

youdao

After six months, the volunteers all returned for a second blood draw and to complete questionnaires about their daily activities.

六个月后，志愿者们第二次抽血，完成关于日常活动的问卷。

youdao

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》

Well, it was not very hard for me to draw this red blood cell here, it's just an oval, and one reason I draw it like an oval, is that that's basically what it looks like if you look at it.

我可以很容易的画出,一个血红细胞,就画个椭圆足矣,因为它看上去就是这个样子的

耶鲁公开课 - 生物医学工程探索课程节选

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