According to low output of Ta and Nb ore concentrate and short supply of raw materials for metallurgy in China, the countermeasures are presented.是什么意思_According to low output of Ta and Nb ore concentrate and short supply of raw materials for metallurgy in China, the countermeasures are presented.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句