Correct ideas come from social practice.

　　正確的思想來自社會實踐。

　　Man's knowledge is not innate but comes from social practice.

　　人的知識不是先天就有的，而是從社會實踐中來的。

　　Only social practice can be the criterion of truth.

　　真理的標(biāo)準(zhǔn)只能是社會的實踐。

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

　　專家說,這是一種無價的社會實踐,可以帶來巨大的好處。

　　Health is an important social practice which protects human's health.

　　衛(wèi)生是人類重要的社會實踐活動。