我以前喺空軍學校同太空指揮部做嘢嘅 咁而家 ， 我做咗系統工程師 最近我著手於美國太空總署嘅 火星任務嘅一個工程問題
I used to work at the Air Force Academy and Space Command, but now I'm working as a systems engineer and I've recently worked United States on an engineering problem for NASA's mission to Mars