// 易错点6：忘记将当前元素入栈，导致前面的元素无法匹配到当前值
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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Author(s): Wei Liu, Xiumin Chen, Kangming Wu, Rong Yu, Xinglong Fu, Ruijiao Jia, Yunmin Chen, Jichang Kang