You can't believe a word she say because she is batsinthebelfry.
她说的话你一句也不能相信,因为她神经失常了。
2
Everybody knows the old man's got batsinthebelfry, but some of his ideas are not as crazy as they sound.
大家都知道这老头儿精神有点失常,可是他有些想法听起来并不那么古怪。
3
I pick them up at the library: Migration Habits of Birds, Urban Structures, and one that I was particularly excited about: BatsintheBelfry: a Joyous Evocation of Architectural Eccentricity.