Within my adult lifetime, we have moved from the murder of civil-rights campaigners in the US to the election of a black president. Nothing to be grumpy about there.
在我成年之后，美国则经历了从刺杀民权领袖（马丁·路德·金）到选出一名黑人总统的过程。这很好，没什么好抱怨的。