let blood

汉语翻译

例句：

1. The challenger seemed to be outclassed, although he was the first to let blood.
   虽然挑战者道德使对方受伤，但他似乎很容易被击败。
2. In olden times, in the case of fevers, the physician always let blood from the patient.
   古时，医生碰到病人患各种热病时，总是给病人放血。