Consequently, it is often necessary to close a series of basins by means of sluices and thus maintain a constant water level in the closed port section.是什么意思_Consequently, it is often necessary to close a series of basins by means of sluices and thus maintain a constant water level in the closed port section.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句