It was, of course, not a squeaking floorboard, or the library management that agitated me. It was my emotional condition, the mental-visceral state I had yet to understand.

当然啦，让我焦躁的并不是那吱呀作响的地板或图书馆馆方，而是一种发自内心、尚待我自己去弄明白的情绪状态。