基本解释[勞經] 永續年金英汉例句權威例句Courageous fools in uniform are guaranteeing themselves lives of perpetual pain with wracking injuries--and they aren't even ensured an NFL salary annuity.FORBES: Magazine Articleperpetual annuity更多例句词组短语短語present value of perpetual annuity 永續年金現值perpetual annuity更多词组专业释义經濟學終身年金永久年金永續年金