before transfusion

• 输血前

before transfusion的用法和样例：

例句

1. It is absolutely necessary to type the patient's blood before a blood transfusion.
   输血前测定病人的血型是绝对必要的。
2. It cannot replace real blood but it can provide a temporary solution until a transfusion can be carried out.
   它无法取代真的血，不过却能在外送输血前，提供短暂的解决方法。