important theories的用法和樣例：
例句
- Special relativity and quantum mechanics were two major theories that appeared subsequently.
狹義相對論和量子力學(xué)是相繼出現的兩個(gè)主要理論。 - The two major theories on the origin of cancer both implicate GSH as a putative protective factor owing to its dual function as antioxidant and detoxifying agent.
有關(guān)癌癥發(fā)生原因的兩個(gè)主要理論都因谷胱甘肽所具抗氧化劑與解毒劑雙重機能，而推定谷胱甘肽應有保護預防的功能。
