anterior extremity的用法和样例：
例句
- Cornea is a disc-like avascular film in the most anterior of the eyeball.
角膜是眼球最前端的圆盘状无血管薄膜。 - Force was applied to each of the anterior AFOs at the anterior-middle and anterior-lateral sides to simulate the movement of ankle plantar flexion and inversion.
研究方法乃分别在两种前穿式足踝装具的前端中央及侧方施力来模拟踝关节跑屈与内翻的施力动作，同时记录施力与踝关节角度变形量之间的关系。
