I have always considered that the true test of a machine is its practical utility in the hands of the common laborer.

不仅仅是广告，产品本身也必须有趣。

We are all translators of our own experiences, turning the raw into the meaningful.

当事人应置身于利害之外，提出倡议的人则应设身于利害之中，才能知道利害得失。

We want to make sure Chinese babies can drink world-class milk powder.

I don't make music for the critics, I make it for the people.

以环境为代价的短期收益终将导致长期损失。

In the end, we are all just trying to survive.

The best ideas come from listening, not just talking.

I don’t fear anyone, but I respect everyone.

The Liskov Substitution Principle is a fundamental concept in object-oriented programming, stating that objects of a superclass should be replaceable with objects of a subclass without affecting the correctness of the program.