同根派生 blood letting相關詞英漢例句Doctors used to let blood when people got fever.過去,當人發(fā)燒時醫(yī)生就給他們放血。It seems keener on blood transfusions than on bloodletting.相比于給經濟放血,它看起來更熱衷于給它輸血。blood letting更多例句