antithrombin

例句：

1. 1.Antithrombin is an important enzyme that helps to prevent blood clots.
   抗凝血酶是一种重要的酶，有助于防止血液凝固。
2. 2.The body produces antithrombin naturally to protect against blood clots.
   人体自然产生抗凝血酶以保护免受血栓的侵害。
3. 3.Researchers are studying the role of antithrombin in preventing heart attacks.
   研究人员正在研究抗凝血酶在预防心脏病发作中的作用。