And as I look forward to other global issues that will require our attention this century -- food security, water security, home security, forced migration -- I see that we certainly do not know how we are going to solve those problems yet.
当我回顾其他的全球议题时， 需要我们对这世纪的关注 -- 食品安全，水源安全， 家庭保全，强制迁移 -- 我想我们目前还不是十分清楚， 该如何解决这些问题。