sulcus for tendon of flexor hallucis longus

例句：

1. 1.The carpenter made a sulcus in the wood to hold the screws.
   木匠在木头上做了一个凹口来固定螺丝。
2. 2. The scientist found a sulcus in the rock that could be used as a water source.
   科学家在岩石中发现了一处凹口，可以作为水源使用。
3. 3. The engineer designed a sulcus in the wall to improve the acoustics of the room.
   工程师设计了一道凹口在墙上，以改善房间的声学效果。