The Upper Shihezi formation with a vast thick mudstone layer can be taken as a very good seal, so it is difficult for natural gas to pass through.是什么意思_The Upper Shihezi formation with a vast thick mudstone layer can be taken as a very good seal, so it is difficult for natural gas to pass through.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句