unfunded liabilities　

unfunded liabilities　无资金准备的负债　

Describing any liability or other expense that does not have savings or investments set aside to pay it.That is，the party responsible for paying an unfunded liability pays for it out of current income or by borrowing.The risk of an unfunded liability is that a payee may not receive that which he/she is entitled to if the payer goes through a difficult financial period.