He was made to eat dust.

他被迫吃灰尘。

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When someone says ''eat my dust," they are saying to their competitors in a race situation that they are confident they are going to win the race, leaving everyone else far behind.

想想看，如果是在一场长跑比赛中，跑在前面的选手脚下掀起的尘土会落在后面选手的脸上，颇有些让他们“吃土”的意味。

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The Environmental Protection Agency (EPA) has compiled an enormous amount of research on dirt consumption. About 45 percent of the stuff we inhale or inadvertently eat is soil, and 55 percent is dust.

环境保护署汇集了大量关于吸入灰尘的研究，我们吸入或无意间吃下去的大约45%是土，55%是灰尘。

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The lowest logs were now buried in the earth, as if returning to their birthplace, and from these logs, from the very lowest part of the hut, were growing two new weak branches, which would one day turn into mighty oaks and eat with their roots the dust of this dwelling that had been exhausted by the wind, the rain, and the human race.

NEWYORKER: Among Animals and Plants