mǎlāsōng / bǐsài / de / zuìhòu / yíduàn / shì / shàngpōduàn / xuǎnshǒu / men / dōu / hěn / chīlì

马拉松比赛的最后一段是上坡段，选手们都很吃力。

The last section of the marathon is an uphill section, and the runners all struggled.