The past is always tense, the future perfect.
The greatest mysteries are those we create ourselves.
Problem solving is the central activity of intelligent systems.
释义：勇敢的人敢闯天下，什么事情都能做成；过于谨慎的人却处处束手束脚，一步也难以前行。
数学是理性的音乐。
今天很残酷，明天更残酷，后天很美好，但绝对大部分是死在明天晚上，所以每个人不要放弃今天。
The most advanced greenhouse is worthless without farmers who understand the rhythm of the plants.