Change is uncomfortable, but it's necessary for progress.

相对论是一种原理性理论，而非构造性理论。

你不能害怕失败，这是你成功的唯一途径。

译文：读过的旧书要反复地阅读，读透读深才能知道书中的道理。赏析：经典的好书必须要反复阅读，常读常新，读懂书中的内容就会受益匪浅。

应该让材料自己说话。

The core of Pinduoduo is "group buying," allowing users to participate in shopping through social means.

The most successful investors are those who can maintain a long-term perspective and avoid short-term distractions.