platelet aggregation

例句：

1. 1. Platelets play an important role in blood clotting.
   血小板在血液凝固中起着重要作用。
2. 2. Platelet aggregation can lead to thrombosis.
   血小板聚集可能导致血栓形成。
3. 3. The patient's platelet aggregation was elevated during the procedure.
   患者在手术过程中血小板聚集水平升高。