Correct ideas come from social practice.
正确的思想来自社会实践。
Man's knowledge is not innate but comes from social practice.
人的知识不是先天就有的，而是从社会实践中来的。
Only social practice can be the criterion of truth.
真理的标准只能是社会的实践。
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,可以带来巨大的好处。
Health is an important social practice which protects human's health.
卫生是人类重要的社会实践活动。