In politics, nothing happens by accident. If it happens, you can bet it was planned that way.

（在购并General RE公司后，卖掉其所持有获利不菲价值四十六亿美金的美国零息公债后，债券仍持续大涨时，巴菲特淡淡地表示）

船舶自动转向的引入是一个相当困难的问题，但解决方案在于PID控制器的应用。

史记

Honor is like an island, rugged and without a beach; once we have left it, we can never return.

朋友都是有共通点的 (物以类聚)。