Kaifeng, an ancient city along the mud-clogged Yellow River, was by far the most important place in the world in 1000.是什么意思_Kaifeng, an ancient city along the mud-clogged Yellow River, was by far the most important place in the world in 1000.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句