William S Comanor,F M Scherer.Patent Statistics as a Measure of Technical Change[J].The Journal of Political Economy,1969,(77):392-398.是什么意思_William S Comanor,F M Scherer.Patent Statistics as a Measure of Technical Change[J].The Journal of Political Economy,1969,(77):392-398.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句