同根派生 blood letting相關(guān)詞英漢例句Doctors used to let blood when people got fever.過去，儅人發(fā)燒時(shí)毉生就給他們放血。It seems keener on blood transfusions than on bloodletting.相比於給經(jīng)濟(jì)放血，它看起來更熱衷於給它輸血。blood letting更多例句