例句與造句

1. The origins of the " market-pull " or " demand pull " are sourced in the literature to Jacob Schmookler.
2. "' Jacob Schmookler "'was the first economist successfully to explore statistically the economics of technological innovation at a detailed industry level.
3. Joseph Schumpeter ( 1950 ) and Jacob Schmookler ( 1966 ) have argued forcefully that technological progress takes place because innovators find it profitable to discover new ways of doing things.
4. It's difficult to find jacob schmookler in a sentence. 用jacob schmookler造句挺難的