After repeated comparisons and experiments, scientists have at last chosen the high-modulus potassium silicate, or PS, as the ideal sand fixing agent .是什么意思_After repeated comparisons and experiments, scientists have at last chosen the high-modulus potassium silicate, or PS, as the ideal sand fixing agent .在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句