我在校期间曾做过销售工作且业绩不错的翻译：I work at a school doing sales and good performance 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

I have done in school sales and the performance is good

I work at a school doing sales and good performance

I in school period once has done the sales work also the achievement is good

I was in school during sales have done a good job and performance

I work at a school doing sales and good performance