Practice is better than theory.

行动胜于空谈。

There is no substitute¹ for experience.

经验是无可取代的。

To put it another way, saying or knowing something is quite different from actually doing it.

换句话说，说或知道某件事和实际去做是大不相同的。

Therefore, we have the saying,

因此，有句俗话说：

"Practice is better than theory. "

“行动胜于空谈。”

While knowing theories is important,

虽然了解理论很重要，

we should put them into practice.

但我们也应该把理论付诸实施。