抽血

抽血	chōu xuè	to take blood / to draw blood (e.g. for a test)
抽	chōu	to draw out; to pull out from in between / to remove part of the whole / to inhale (esp. smoke) / (of fabric etc) to shrink / (of certain plants) to sprout; to bud / to whip; to thrash / classifier for sheets (of tissues, wet wipes etc)
血	xuè	blood (CL:滴) / colloquial pr. [xie3] or [xue3]