贫困是顽疾，“顽”在成因复杂、难以根除、极易反复。
The company’s tech comes from an unusual source: a $100-million-endowed program at Caltech to develop orbital solar plants that would beam electricity to Earth below. The researchers ultimately settled on a sail-like structure that is thin and flexible compared to boxy, traditional satellites.
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设立5年过渡期，成为中国特色减贫道路的又一创举。