作者指出，至1995年，全世界只有百分之十七的土地杳无人烟—无人居住、没有农作物、道路以及能被卫星侦测的夜间照明。

As of 1995, only 17 percent of the world's land area remained truly wild? With no human populations, crops, road access or night-time light detectable by satellite, the authors reported.

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作者指出，至1995年，全世界只有百分之十七的土地杳无人烟—无人居住、没有农作物、道路以及能被卫星侦测的夜间照明。

As of 1995, only 17 percent of the world's land area remained truly wild? With no human populations, crops, road access or night-time light detectable by satellite, the authors reported.

youdao