thrombinogen

例句：

1. 1. The doctor prescribed a blood thinner to prevent blood clots.
   医生开了一种抗凝血剂来防止血栓。
2. 2.The patient's condition required immediate treatment.
   病人的状况需要立即治疗。
3. 3. Blood transfusions are often necessary during surgery.
   手术期间经常需要进行输血。