standardbred

例句：

1. 1. The standardbred horses are known for their graceful movements and beautiful colors.
   这些标准品种的马以其优雅的动作和美丽的颜色而闻名。
2. 2. The standardbred horses have been used in equestrian events for centuries.
   这些标准品种的马在马术比赛中已经使用了数百年。
3. 3. The standardbred horses are bred for their ability to perform at the highest level in competitions.
   这些标准品种的马被培育出来，以在比赛中表现出最高水平的能力。