English: How does The Two Towers contribute to the overall story arc of the trilogy?
translation: 雙城奇謀
translation: 雙城奇謀對三部曲的整體故事弧線有何貢獻？
translation: 雙城奇謀》對三部曲的整體故事情節有何貢獻？
translation: 雙城奇謀對三部曲的整體故事有何貢獻？