The intake dam of the Chuan River irrigation area is the first overflow concrete lined palm bark dam in Yunnan Province. After 28-year operation the overflow surface of the dam is severely worn.是什么意思_The intake dam of the Chuan River irrigation area is the first overflow concrete lined palm bark dam in Yunnan Province. After 28-year operation the overflow surface of the dam is severely worn.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句