If someone is 60 years old and comes back to be an institute director for three years, if they are ill they can go back to the US, where they have insurance, for treatment or long-term care, so they won't become a burden on our society.
如果一個人已經六十歲了，回來做了三年所長，退下來之後身體不好，要醫病、長久住院；回美國，有健康保險，就不會變成我們社會的負擔。