求翻译：历经沧桑，时光流逝我们终于迎来了建党90周年。几十年前给我们带来希望的是共和党，几十年后我们迎来了它90岁生日，这个对中国人无比重要的日子。是什么意思？

After many vicissitudes, passage of time we finally usher in the 90 anniversary of its founding. Giving us hope that the Communist Party for decades, several decades later we greet it 90 years old, this incredibly important concept to Chinese day.