Based on the study of the MgO-TiO 2-ZnO system,the NPO is obtained with its temperature coefficient almost close to zero.是什么意思_Based on the study of the MgO-TiO 2-ZnO system,the NPO is obtained with its temperature coefficient almost close to zero.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句