President Obama's visit to China this week inevitably invites comparisons between the world's two leading powers.

奥巴马本周的中国之行不可避免地会引来人们对这世界上的两个大国的比较。

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Its leading powers colonized half the world, and engaged in military rivalries that produced a thriving arms industry.

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For starters, the interactions between the U.S. and China are far more numerous and substantive than they have been in previous meetings between rising powers and leading powers.

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The original idea was to boost co-operation between leading economic powers in fiscal, monetary and commercial matters.

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