Nose in a book可不是鼻子在书里，真实意思是埋头读书

【例句】
She always has her nose in a book.
她总是在埋头苦读。

Mother cannot get Mary to help do the housework; she always has her nose in a book.
母亲叫不动玛丽帮她做家务，她总是忙着看书。