lighter legs
轻的腿
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Suddenly my legs felt a little lighter, and I made it to the finish line, carried along on a wave of encouragement.
我的脚步突然感到较轻省，靠着群众不断的鼓励，我终于到达终点。
youdao
Ring tabs can be recycled into components for artificial legs that are lighter and cheaper.
拉环可再循环制成义肢的组件，因为轻便与经济。
Also, while his artificial limbs are lighter than human legs, he must push off the ground harder to get the same thrust, which cancels out any advantage.
CNN: Oscar Pistorius, an inspiration and a question
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