The U. S. -Canadian study will focus on such issues.

美国-加拿大的研究将集中在这些问题上。

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U. S. politicians focus on everything but controlling population for the current and future generations.

美国政客关注很多问题，唯独没有控制人口这个关乎当前以及子孙后代的事情。

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Apple's focus remains on its core U. S. market, and also on Europe.

苹果的重点依然在其核心的美国市场，同时还有欧洲市场。

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Apple's focus remains on its core U. S. market, and also on Europe.

苹果的重点依然在其核心的美国市场，同时还有欧洲市场。

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