underfunded plan不足额基金
Underfunded Accumulated Benefits表不足额提拨
be chronically underfunded长期缺乏资金
ADJ（形容词） An organization or institution that is underfunded does not have enough money to spend, and so it cannot function properly. 经费不足的
For years we have argued that the FDA is underfunded.
数年来我们一直在讲食品及药物管理局经费不足。