原本七层的北川中学主教学楼，已经成为了仅高两米的废墟堆。
The main building of the Beichuan Middle School, a seven-story structure, had been reduced to a pile of rubble about 2 meters high.
捍城通常高两米，宽一米左右，主要作用是保护城脚、增强防洪能力。
They served as a protection means of the city wall and strengthen the city's ability to combat floods.
它有两米高。
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