He is building castles in Spain among his books.

他埋头于书本中想得天花乱坠.

She spends most of her time building castles in Spain .

她把大部分时间都用来想入非非了。

If you ever bring us a plan of Castles in Spain like this again, we'll ban you from the company for life.

如果你再给我们送来这样胡扯的计划，我们就把你撵出公司。