除非不再尝试，否则就没有失败。
The true value of a forest is measured not in board feet, but in biodiversity.
In computing, invariants are ephemeral.
释义：善于游泳的人容易被淹死，善于骑马的人常常落马而摔伤，他们各因自己的爱好特长而招致灾祸。比喻有专门本领的人往往因自恃而招致灾祸。
"The past is always tense, the future perfect."