回答

・be exhausted
・lose the feeling in legs

「腿變得僵硬」在英語中可以用be exhausted或lose the feeling in legs來表達。

I climbed a mountain for the first time in a long time and became exhausted.
（我好久沒爬山了，爬完後腿變得僵硬。）

I usually only do office work, so sometimes when I work all day at a sales event, I lose the feeling in my legs around the evening.
（我通常只做辦公室工作，所以有時在銷售活動中工作一整天，到傍晚時我的腿變得僵硬。）

有幫助｜0