好心人帮我翻译成英文，我译不好~

Working as a sales person enabled me to think at consumers' position and understand their mind whilst being a typist allowed me to be concentrated/preoccupied and tough and my TA experience taught me to enjoy helping other people.
绝对是最工整的 如果你有判断力

My experience as a sales person taught me consumer psychology, and I learned to think in others' point of view, while my experience as a typist tempered my attention and perseverance, and the TA position allowed me to enjoy the fun of helping others.

手工翻译

Sales are doing so I realized that the consumers in mind, learned how to stand on each other's point of view, but at the same time typist to do my training focus and persistence, teaching assistants are, let me experience the joy of helping others

Being a salesman enabled me to know what the consumers thinking and taught me how to think from the consumers aspects; Being a typist strengthened my concentration and willpower; Being a teaching ass