They pay close to US$5,000 to participate in the race, which goes up and down muddy, snowy hills and across icy streams.

他们要支付高达五千美元的参赛费，途经高低起伏、泥泞而满是积雪的山丘，还要穿越冰冷的溪流。

youdao

We took a tester Rover through the nastiest muck, up snowy mountainsides and down the other side, through streams and headfirst into 4 feet of standing water down a 45-degree mud slope.

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