A method of solution is perfect if we can foresee from the start, and even prove, that following that method we shall attain our aim.
如果我们从一开始就能预见，甚至证明，遵循某种方法我们将达到我们的目标，那么这种解决方法就是完美的。
世界是一首伟大的歌，我们是其中的歌手。
Love is about understanding, patience, and forgiveness.
The most important thing is to keep your mind active.
可持续性不是一种选择，而是我们对后代的责任。