Pǎo / dào / chéng / mǎ / tí / xíng / yùn / dòng / yuán / xū / yào / zài / liǎng / gè / wān / dào / chù / jiǎn / sù

跑道呈马蹄形，运动员需要在两个弯道处减速。

The track is horseshoe-shaped, so athletes need to slow down at the two bends.