Most of the sediment directly enters the headwaters of the Mekong River or is deposited in riparian areas where it is entrained during later floods.是什么意思_Most of the sediment directly enters the headwaters of the Mekong River or is deposited in riparian areas where it is entrained during later floods.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句