planum popliteum

例句：

1. 1. The doctor examined the patient's knee and found a planum popliteum injury.
   医生检查了患者的膝盖，发现髌骨下缘受伤。
2. 2. He had to have surgery on his knee, which involved removing the planum popliteum.
   他不得不对他的膝盖进行手术，这涉及到切除髌骨下缘。
3. 3. During the game, she felt a sharp pain in her knee, and it was determined that she had a planum popliteum injury.
   在比赛中，她感到她的膝盖很痛，确定她有髌骨下缘受伤。