The sun was warm, and the trotting horses threw up bits of muddy snow with their hoofs.
太阳很暖和,小跑的马蹄子扬起泥泞的雪花。
英语百科
Harness racing
(重定向自Trotting horse)
Harness racing is a form of horse racing in which the horses race at a specific gait (a trot or a pace). They usually pull a two-wheeled cart called a sulky, although in Europe racing under saddle (trot monté in French) is also conducted.