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The whole honours and pride in the world, all come from the mother.

My dad was my best friend and greatest role model. He was an amazing dad, coach, mentor, soldier, husband and friend.

數學中最深刻的思想往往來自最簡單的問題。

給一個人火，他能溫暖一天；但把他點燃，他能溫暖余生。