let blood

• vi. 放血

例句

用作不及物动词 (vi.)

1. Doctors used to let blood when people got fever.
   过去，当人发烧时医生就给他们放血。
2. It seems keener on blood transfusions than on bloodletting.
   相比于给经济放血，它看起来更热衷于给它输血。