Correct ideas come from social practice.

正确的思想来自社会实践。

《新英汉大辞典》

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。

《新英汉大辞典》

She's determined to put her new ideas into practice.

她决心要把自己的新想法付诸实践。

《牛津词典》

Oftentimes, inventions that seem, in the abstract, to be good ideas may be impossible because something that you have to do to make it actually come into practice is too expensive and so it's not economic to produce the invention.

通常在理论上,创新固然不错,但却很难实现,因为把创意变成现实,花费会相当的昂贵,实现这样的创意非常不合算

耶鲁公开课 - 金融市场课程节选

and what is a good practice to do is help develop your ideas of the things - set your intentions,

这个练习会帮助你发展思维——确定你的打算。

英语写作：技巧 - SpeakingMax英语口语达人

According to a spokesman for the website, the project is the most successful so far to have obtained funding through via crowd-sourcing - the practice of raising ideas, services or money via the internet.

BBC: Veronica Mars fans make film dream a reality

Treasury ministers want to stand firm on the principle but be flexible on the practice - examining ideas to roll over unused tax relief from one year to the next or allowing tax free lifetime legacies.

BBC: Charity tax: Wanted - a solution

Since Mr Suharto stepped down, he has put his ideas into practice in a handful of farm projects.

ECONOMIST: The Robin Hood of Java