theory

🇬🇧/ˈθɪəri/ 🇺🇸/ˈθiːəri/📚 921 84 4四级六级考研雅思高考
A theory is a formal idea or set of ideas that is intended to explain something. 理论

noun [抽象名词]学说,理论;(某一学科基于的)理论,原理;观点,见解

The theory remains untested.

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