所
suǒ
(particle: that which; also marks the passive); measure word for schools and buildings; place; institute
In a story
“你好，许工程师。根据我所掌握的数据，柳湾大坝在今年秋季发生事故的概率为百分之三十七。”“Hello, Engineer Xu. According to the data available to me, the probability of an accident at the Liuwan dam this autumn is thirty-seven percent.”第二份报告 · The Second Report · HSK 6
Grammar with 所
因为…所以
因为…所以… — because…so
之所以…是因为
之所以…是因为… — the reason why…is that
所
所 — structural 所 (所 + verb; 为…所…)
所谓⋯⋯就是⋯⋯
所谓⋯⋯就是⋯⋯ — what is called X is Y
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