我们不仅要知道理论，还要知道怎样把理论应用于实践。
We should not only know the theory but also how to apply it to practice.
我们不仅要知道理论，还要知道怎样把理论应用于实践。
We should not only know the theory but also know how to apply it to practice.
我们应该把这一理论应用于实践。
最大的问题是，把理论知识应用于具体实践时，障碍重重。
The most difficulty matter was that I couldn't put the theories into practice easily.
最大的问题是，把理论知识应用于具体实践时，障碍重重。
The most difficulty matter was that I couldn't put the theories into practice easily.
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