回複：請教熱心人,幾句中文翻英文,多謝!

主要做等等方麵的工作: mainly responsible for ...
specialized in..., major responsibilities were ...
'業務 '太籠統啦, 自己找個確切的名詞套進去
工作其間表現優異: excellent performance during his/her employment

於何時正式離職: when did XXX officially resign?