The study of economic theory includes pure theoretical study and practical economystudy.
经济理论研究包括纯理论研究和现实经济研究。
2
According to one study, each high school graduate contributes at least 500,000 dollars to the local economy.
一项研究表明，每个高中毕业生至少为当地经济贡献了50万美元。
3
One study has calculated that the lifetime benefit to the local economy for a single additional student who completes high school is half a million dollars or more.