t slippery surface
光滑表面
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Video of the annual riderless race in Ronciglione shows that horses there do make turns, although the surface is slippery and they don't seem to be running at full speed.
WSJ: Kentucky Derby: Do Horse Races Really Need Jockeys?
应用推荐
模块上移
模块下移
不移动