The practical principle of morality education should be stuck to.

坚持道德教育方法的实践性原则。

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The practical principle of the electric equipment automation for heat wind barrel type dryer was introduced in this paper and the outside equipment joint and the software program method were showed.

介绍了热风桶式烘干机电气设备自动化的实现原理，给出了外围设备连接和软件编程方法。

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There are many human behaviours that fit into the principle of quantity change and quality change. His three inductions are practical as well.

人类的很多持续的行为都可以用到量变与质变的原理，他的三个推论也很有用。

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instead of pursuing the questions of how exactly that theory should go, notice that if we had that theory ... we could still evaluate in principle-- whatever the practical difficulties might be-- in principle we could still evaluate rival lives.

我们不去研究,那种理论如何发挥作用，即便我们有那种理论,原则上我们仍然可以-,不管实际困难是什么-,原则上我们仍然可以评价其他生活。

耶鲁公开课 - 死亡课程节选

The e-learning programme is founded on the basic and practical principle that the use of the internet as a learning tool not only creates anonymity and thus dismantles the psychological barriers that prevent illiterate adults from resuming their studies but also enables them to balance their work, family and learning commitments by learning at home at whatever time is suitable to them.

UNESCO: Ich will lernen (I want to learn)

For many scientists, however, it is the principle that counts, not the practical engineering.

CNN: Time travel: Can it really be done?

While Jackson and his successors framed economic policy as a matter of limited-government principle, Howe argues that the practical difference was that the Whigs sought to create a coherent national transportation system, while Jackson preferred to dole out projects on an ad-hoc basis to individual states.

FORBES: Is the GOP the Party of Andrew Jackson?