德国的“千顶计划”，日本的“朝日七年计划”，美国的“百万屋顶计划”，都是有力证明。
"Thousand plans" of Germany, "the morning sun was planned in 7 years" of Japan, "plans to 1000000 roofs" of the United States, all is the strong proof.
德国的“千顶计划”，日本的“朝日七年计划”，美国的“百万屋顶计划”，都是有力证明。
"Thousand plans" of Germany, "the morning sun was planned in 7 years" of Japan, "plans to 1000000 roofs" of the United States, all is the strong proof.
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