actuarial surplus造句

Years ago, corporations also withdrew actuarial surpluses from their pension funds, and put the money to work in the business.
Their Lordships would observe that, even in the ordinary case of an actuarial surplus, it is not obvious that, when employees are promised certain benefits under a scheme to which they have contributed more than was necessary to fund them, they should not expect to obtain a return of their excess contributions.
It's difficult to find actuarial surplus in a sentence. 用actuarial surplus造句挺难的