殖民主义没有结束，它只是换了衣服。
Colonialism didn't end, it just changed its clothes.
The pursuit of mathematical knowledge is a journey that never ends, filled with endless curiosity and wonder.
Natural experiments can provide valuable insights into economic questions.
我很幸运能成为团队的一员，他们让我看起来很棒，他们和我一样值得为赢得的奖杯获得赞誉。