读《Akin's Laws of Spacecraft

Engineering is done with numbers. Analysis without numbers is only an opinion.
什么是事实，什么是观点？观点就是主观的。客观其实对于社会科学来说，是别人的主观观点。对于计算机或物理学，数字变得十分重要。

It's a good idea to design a spacecraft to operate when something are wrong.
主动安全的系统是一种自我保护的系统，即使有一些模块不能正常工作。

Design is an iterative process. The necessary number of iterations is one more than the number you have currently done. This is true at any point in time.
迭代是个设计的过程。如何平衡好与更好？如何抓住主要矛盾？如何忽略次要的、或是不重要的方面？设计就是在不断地平衡之间的关系。不同的时间，不同的场景，会有不同的设计。

Your best design efforts will inevitably wind up being useless in the final design. Learn to live with disappointment.
付出了极大的努力，仍旧不被认可，如何办？接受现实，但是要注意现实只是现实而已，不必太在意。就像商场中的一件衣服，总有人喜欢而买了它，也总有人说难看，打死也不会买。人们总会有自己的喜好，不必强求别人，更不要强求自己。

Three points determines a curve.
没看明白。

Everything is linear if plotted log-log with a fat magic maker.
同样没明白。

At the start of any design effort, the person who most wants to be team leader is least likely to be capable of it.
什么人才能成为领导者？什么是领导力？只要充分信任，并且给够利益的人，才配得上领导者。什么是领导力？在关键时刻，挺身而出解决 Dirty Work；为推进项目进展，脏活、累活没人干，把这些事都做了的能力才是领导力。

In nature, the optimum is almost always in the middle somewhere. Distrust assertions that the optimum is at an extreme point.
最优点总是在中间的某个位置。

Not having all the information you need is never a satisfactory excuse for not starting the analysis.
凡事总是不可能万事具备，在不完全信息下做事情，也是做事的一种常态。在做的过程中，反复迭代，将事情达成。

When in doubt, estimate. In an emergency, guess. But be sure to go back and clean up the mess when real numbers come along.
做事而言，不决策可能比一个糟糕的决策更糟糕。另一个关键点是，当有新信息后，进行复盘和调整。

Sometimes, the fastest way to get to the end is to throw everything out and start over.
有时候，推倒重来，也许是更好的选择。没有了包袱，就能轻装上阵。有点象重构，总要隔一断时间来一次。

There is never a single right solution. There are always multiple wrong ones, though.
好方案不只一个，但是坏方案总是有多个。其实，两害相权取其轻，也是一种方案的选择。

Design is based on requirements. There's no justification for designing something one bit "better" than the requirements dictate.
千万不要闭门造车。要去调查用户的需求，听他们的想法，观察他们的做事，然后再去抽象出真正的、要开发的需求。

（Edison's Law）"Better" is the enemy of "good".
这句话，至理名言。

(Shea's Law) The ability to improve a design occurs primarily at the interfaces. This is also the prime location for screwing it up.
设计的核心是在于划分模块。模块是以介面或接口来呈现出来的。一个人的架构设计的功力也在于此。

The previous people who did a similar analysis did not have a direct pipeline to the wisdom of the ages. There is therefore no reason to believe their analysis over yours. There is especially no reason to present their analysis as yours.
通常人的水平都差不多。

The fact that an analysis appears in print has no relationship to the likelihood of its being correct.
分析家的结论只能参考，不能完全信。

Past experience is excellent for providing a reality check. Too much reality can doom an otherwise worthwhile design, though.
以往的经验会对工作有帮助。但是，过多的经验会人变得保守，会扼杀创新的思想。

The odds are greatly against you being immensely smarter than everyone else in the field. If your analysis says your terminal velocity is twice the speed of light, you may have invented wrap drive, but the chances are a lot better that you've screwed up.
异想天开有时并不只是一个幻想。即便是搞砸了，机会也可能真的出现了。

A bad design with a good presentation is doomed eventually. A good design with a bad presentation is doomed immediately.
努力工作与好的宣传是缺一不可的。

(Larrabee's Law) Half of everything you hear in a classroom is crap. Education is figuring out which half is which.
教育是什么？为什么要接受教育？这就是过来人的答案。