学习资料

[意       思]n. 理论，学理，原理
[例]  It seems good in theory, but it doesn't work in practice. 理论上它似乎很不错,但实际上却行不通。
n. 学说
[例]  Darwin spent more than twenty years working on his theory of evolution. 达尔文花了二十余年时间研究他的进化论。

更多意思

n.1.  学说，论，说
2.  理论，原理，原则
3.  （未证明的）意见，看法，推测

参考例句

1.	Her theory was quoted without (an) acknowledgement.
	她的理论被人引用而未向她致谢。
2.	My theory applies to you and by analogy to others like you.
	我的理论适用于你,照此类推,也适用于像你这样的其他人。
3.	Scientists have advanced a new theory to explain this phenomenon.
	科学家已提出一种新理论来解释这一现象。
4.	The theory is based on a series of wrong assumptions.
	这一理论是以一系列错误的设想为根据的。
5.	Einstein's theory marked a new epoch in mathematics.
	爱因斯坦理论开创了数学的新纪元。