It's a national standard that can spread globally and be a steppingstone to even higher fuel standards in future.

他说，“这是一项全国性的标准，可以扩展到全球，为未来设立更高的燃油标准做铺垫。”

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A coward considers difficulties as a heavy burden on his back, but a valiant fighter turns difficulties into a steppingstone for his advance.

懦夫把困难当做沉重的包袱，勇士把困难化作前进的阶梯。

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A coward considers difficulties as a heavy burden on his back, but a valiant fighter turns difficulties into a steppingstone for his advance.

懦夫视困难为压在其后背的一项重负，而勇者把困难转化为其进步的台阶。

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The possibility also exists that Silberman can use this opportunity as a steppingstone to other ventures.

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While natural orifice surgery "isn't ready for prime time, maybe it's a steppingstone to something else, " Shikora said.

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Via Appia Antica stretches out south of Rome, as straight as a die, its steppingstone cobblestones disappearing into the distance.

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