economic returns造句

1、Economic returns have further improved. National revenue has kept growing.
经济效益进一步提高，财政收入不断增长。

2、A 2005 Harvard study found "powerful new sources of economic returns from immunization." 2.
2005年哈佛一项研究发现“免疫接种为强有力的新的经济回报源。”

3、I was a sophomore of Hubei Institute of Economic returns of undergraduates, summer, I hope.
我是湖北经济学院大二的一名在校本科生，暑期返回荆门，我希望。