The plan is part of a new exhibit opening in Paris on April 30, 2009, that envisions the metropolis circa 2030 as one of the most environmentally sustainable cities on Earth.是什么意思_The plan is part of a new exhibit opening in Paris on April 30, 2009, that envisions the metropolis circa 2030 as one of the most environmentally sustainable cities on Earth.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句