leglen

例句：

1. 1. The marathon runners are competing to see who can run the longest leg.
   马拉松跑者正在竞争，看谁能跑得最远。
2. 2.The tall man has a long leg, which makes him stand out in the crowd.
   那个高个子男人有一条很长的腿，这使得他在人群中格外显眼。
3. 3. The doctor advised the patient to have his leg lengthened to improve his mobility.
   医生建议病人将腿部长度增加以改善他的行动能力。