她在图书馆。
Does anyone know where Mary is? (Perhaps she is in the library.)
谁知道玛丽在哪里吗？(她可能在图书馆。)
She is either in the library or in the classroom.
她不是在图书馆，就是在教室里。
She is reading in the library rather than in the classroom.
她正在图书馆里看书而不是在教室里。
Jennifer can't be in the library, because she is reading in the classroom now.
詹妮弗不会在图书馆，因为她正在教室读书。
She is normally in the library on the third floor.
她通常在第三层的图书馆。
She is normally in the library on the third floor.
她通常在第三层的图书馆。
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