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1·The first part of the race is not really difficult; it's the final three miles over rough and hilly ground that will separate the men from the boys.

比赛的第一阶段并不很困难，只是在最后三英里的不平整的山地上才分出高低强弱。

2·The ground of the University was hilly;

这条高速公路依丘陵地形起伏修筑。

3·The working in the middle of the property below hilly terrain experienced normal ground movement due to presence of considerable side confinement.

在中间的工作下列财产丘陵地形经历正常的地面运动由于分娩存在很大方。