The most that can be expected from any model is that it can supply a useful approximation to reality.
对任何模型的最大期望是它能提供一个对现实有用的近似。
The motto of chivalry is also the motto of wisdom; to serve all, but love only one.
The past is always tense, the future perfect.
文学的美在于它超越时间和空间的能力。