The book-bag is behind the door. 書(shū)包在門(mén)背后。
She passed and repassed Catherine's door several times in the course of the evening, as if she expected to hear a plaintive moan behind it. 在晚上這段時(shí)間里,她幾次經(jīng)過(guò)凱瑟琳的房門(mén),好象在等待從門(mén)背后傳來(lái)一聲哀慟的呻吟。