n.延長；加長
動(dòng)詞lengthen的現(xiàn)在分詞形式.
Instead of using a leg lengthening device, shinbone experimenters may apply ankle weights to stretch out the shinbone. 脛骨實(shí)驗(yàn)者將應(yīng)用腳踝的重量延長脛骨，從而代替使用腿部延長設(shè)備。
