理论

1. 理论上是如此。
   It is so in theory.
2. 那个理论的精髓是为人民服务。
   The pith of that theory is serving for people.
3. 这种理论与已知事实不符。
   This theory is at variance with the known facts.
4. 老教授主持了一次理论物理学家的研讨会。
   The old professor had presided over a seminar for theoretical physicists.
5. 这是一种理论上的可能性，但我认为这种情况不会发生。
   It's a theoretical possibility, but I don't suppose it will happen.
6. 这本书理论性太强，我需要一本实用的。
   This book is too theoretical; I need a practical one.
7. 这样他们就能更好地把理论运用到实践中去。
   In this way they can better apply theory to practice.
8. 终于在一六八七年他发表了他的新理论。
   Only in 1687 did he at last publish his new theory.

理的英语翻译：

论的英语翻译：