But how? 但该怎么做呢

287. and my repulsive nephew will be King after him.
     我那可恶的外甥有朝一日会继任王位
288. I must do my part for the honor of my house,
     担着家族名誉，我总得尽点心力
289. wouldn't you agree?
     你说对吧
290. But how?
     但该怎么做呢
291. Well, my brother has his sword
     老哥有他的宝剑
292. and I have my mind.
     我则有我的脑袋瓜
293. And a mind needs books like a sword needs a whetstone.
     好脑筋需要书本，就如同宝剑需要磨刀石

来自《权力的游戏 第一季 第二集 Game of Thrones S01E02 凯特琳险遭暗杀》第 290 行