Grandepa Spring, Texas, 美國 母语 : 英语 <=> 练习语言 : 中文 (普通话) Worked in Chemical Industry for 38 years. Engineering background. Have been retired for 11 1/2 years. Hobbies are fishing, baking and doing volunteer work. I am learning German and Mandarin but need more help with Mandarin. 查看资料 排序 - 最近访问时间 添加时间 « »
英语
中文 (普通话)