The key to managing complexity is to focus on the interfaces between components, not their implementations.
管理复杂性的关键在于关注组件之间的接口，而不是它们的实现。
The truth is rarely pure and never simple.
解释：处在有利的地位上想到道义，处在困难之中想到保持纯正。
适应性是当今动荡市场中企业最大的优势。
The true investor scarcely ever is forced to sell his shares, and at all other times he is free to disregard the current price quotation.