Becausethe Colorado River flow through them, it also known as the GrandCanyon, which is protected by UNESCO as one of the natural heritage.是什么意思_Becausethe Colorado River flow through them, it also known as the GrandCanyon, which is protected by UNESCO as one of the natural heritage.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句