popliteal line

例句：

1. 1. The popliteal line is a crucial part of the knee joint's structure.
   腘动脉线是膝关节结构中至关重要的部分。
2. 2. During surgery, the popliteal line is carefully dissected to avoid damaging the nerves.
   在手术过程中，要仔细分离腘动脉线以避免损伤神经。
3. 3. The popliteal line is often used as an indicator for the location of the knee joint.
   腘动脉线通常被用作膝关节位置的指示器。