All the processions wound towards the north side of the city, where on the great water-meadow called the Green Fields boys and girls naked in the bright air, exercised their horses before the race.
句意：所有游行队伍都沿着蜿蜒曲折的街道迤逦向北行进，来到一个称作绿野的大草坪上。草坪上 早有一些光着身子、脚踝沾满泥巴、手臂长大而灵活的青年男女在那儿对他们的马进行赛前训练。此处的 wound为wind的过去时。wind蜿蜒；曲折而行。thrust猛推。zigzag曲折地前进。D选项与划线处意义最为接近；故选D。