Correct ideas come from social practice.

正确的思想来自社会实践。

Only social practice can be the criterion of truth.

真理的标准只能是社会的实践。

Correct ideas are not innate in the mind, but come from social practice.

正确的思想不是头脑中先天固有的，而是来源于社会实践。

Experts say it's an invaluable social practice that results in big benefits.

专家说这是一种无价的社会实践，能带来巨大的好处。

Surely social practice has many advantages.

肯定社会实践有许多好处。