基本解释[劳经] 永续年金英汉例句权威例句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语present value of perpetual annuity 永续年金现值perpetual annuity更多词组专业释义经济学终身年金永久年金永续年金