Senior high school; Course resources; The development make use of; Present condition.
高中；课程资源；开发利用；现状。
21 centuries is mankind development and make use of the underground space of century.
21世纪是人类开发和利用地下空间的世纪。
21 centuries is mankind development and make use of the underground space of century.
21世纪是人类开发和利用地下空间的世纪。
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