cháng / shí / jiān / bǎo / chí / yí / gè / zī / shì / hòu / tā / de / shuāng / tuǐ / gǎn / dào / sū / má

长时间保持一个姿势后，他的双腿感到酥麻。

After staying in one position for a long time, his legs felt limp and numb.