The coarse sand area located in the middle reaches of the Yellow river is the main source area which produces the most amount of the deposited sediment in the riverbed of the Yellow river.是什么意思_The coarse sand area located in the middle reaches of the Yellow river is the main source area which produces the most amount of the deposited sediment in the riverbed of the Yellow river.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句