从十年前混合动力车第一次在美洲的高速干道和荒野小径上风驰电掣以来，已经占有新车销售市场份额的2.5%之多。

In the ten years since hybrid electric vehicles first hit the highways and byways of America, they have come to represent 2.5% of new car sales.

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只有西部美洲狮的存在数量还足以维持种群繁衍，它们生活在美国西部和加拿大的荒野里。

Only western cougars still live in large enough numbers to maintain breeding populations, and they live on wild lands in the western United States and Canada.

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研究发现，荒野损失最严重的地区是南美洲和非洲中部。

The research found that the regions that suffered the biggest wilderness losses were South America and Central Africa.

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