Democracy is not a spectator sport.
民主不是观众运动。
The importance of theoretical computer science lies in its ability to provide a foundation for practical applications.
The past is a foreign country; they do things differently there.
采矿业的创新不是可选项，而是生存必需。
The only thing that can make a difference is love.
战争最可怕的地方在于它让人们习惯了死亡。