求高手,中译英 这段时间的努力让我为自己打下了不错的英语、数学和经济学的基础。

My effors during this period laid satisfactory foundation on English, Maths and Economics for me.

through these time's hard working,i have laid great foundation for myself on English, math, and economics.

It helps me to lay a solid foundation in English, maths and economics after this period's hard working.

I have found a good foundation for English,maths and economics through these days' hard working.