Hi everybody.In America, we believe that a lifetime of hard work and responsibility should be rewarded with a shot at a secure, dignified retirement.It&#39s one of the critical components of middle-class life-and this week, I took new steps to protect it.大家好！在美国，我们都认为一个人经历一辈子的辛勤付出和担当之后，应该能够体面地退休、安享晚