求翻译：南希感到很惊讶，他们一起来到教学楼前。通过询问约翰，海伦和南希了解教学楼里面有40个教室，2个乒乓室，4个阅览室和5个电脑室。是什么意思？

Nancy was very surprised that they came to the teaching front. By asking John, Helen and Nancy understand the school buildings there are 40 classrooms, two ping-pong room, four reading rooms and five computer rooms.

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Nancy felt very surprised, they together arrive in front of the classroom building.Through inquires John, Helen and Nancy understood inside the classroom building has 40 classrooms, 2 PingPong rooms, 4 reading rooms and 5 electricity ventricleses of the brain.

Nancy surprised they came to teaching building. By asks John, teaching building of Helen and Nancy about 40 classrooms, 2 ping-pong room, 4 reading rooms and 5 computer rooms.

Nancy was surprised, they came to teaching in front of the building. By asking John, Helen and Nancy about the teaching building with 40 classrooms, 2 table tennis room, 4 and 5 in the reading room computer room.