电影不是展示生活的本来面目,而是展示它可能成为的样子。
Timing the market is a fool's game. It's far better to focus on time in the market.
For systems, the analogue of a face-lift is to add to the control graph an edge that creates a cycle, not just an additional node.
The only thing that you absolutely have to know is the location of the library.