In economics, small changes in rules can lead to large changes in outcomes.

The world is a book, and those who do not travel read only one page.

The path to a lower-carbon future will require multiple solutions and approaches.

如果船长的最高目标是保住他的船，那他会永远把它停在港口。

因果方法在于理解生成数据的机制。

办丧事虽有一定的礼仪，但还是以哀痛为本。