But, in the main, they had thought only of living to themselves in woods and caves and building up an attempt at Old Narnia in hiding.

【结构分析】

1. 本句主要结构是：think of doing sth. （希望、想要、考虑做某事）

2. of 后面有两个并列的动名词：living to themselves in woods and caves and building up an attempt at Old Narnia in hiding

3. live to oneself：独自生活；隐居。

4. in the main：习语。总的来说。

5. build up an attempt at：在......方面建立一种尝试。

6. Old Narnia in hiding：old 指古老传统的；in hiding 作定语，意为“处于隐蔽的；不为外人所知的”。

But, in the main, they had thought only of living to themselves in woods and caves and building up an attempt at Old Narnia in hiding.

【翻译】不过，总的来说，他们只想隐居在树林中和洞穴里里，试着建立一个隐蔽而古老的纳尼亚。