你看得越多，看到的就越多。

"In observational studies, we often have to rely on assumptions that are not directly testable."

The truth is rarely pure and never simple.

To lose patience is to lose the battle.

质量比数量更重要。一个全垒打比两个二垒安打好得多。

The city is like a great palimpsest, a manuscript that has been written and rewritten over the centuries.