设计中最难的部分是保持功能的简洁。
The hardest part of design is keeping features out.
朋友可以来来去去，但精神却永远常驻。
煤炭仍将是重要的能源，但前提是我们与时俱进。
The problem with quantitative easing is that it works in practice but it doesn't work in theory.
