Or maybe the food comparison is not apt because diets differ between countries.

不过由于国家之间饮食不同可能用食品作为比较不太恰当。

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But it also makes a more detailed comparison between the pluses and minuses of fast trains for the two countries difficult.

但这也同时使二者高铁之间孰优孰劣的详细比较变得更为困难。

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The most vivid illustration comes from a comparison between two African countries: Ethiopia and Somalia.

来自于两个非洲国家埃塞俄比亚和索马里的比较是最生动的事例。

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These difficulties - not to mention social differences - make comparison of crime rates between countries difficult.

BBC: What's the price of DVD players got to do with crime?

But Neelie Kroes, the competition commissioner, rejects any comparison between the car industry and the financial sector, and has warned member countries against offering their carmakers unfair subsidies.

ECONOMIST: The car industry