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徐曙同志除了向我们发来了上文,还同时发来了本篇科普小常识。一问一答,条理清晰,内容扼要。与上文构成“姊妹篇”。
In addition to sending us the above article, Comrade Xu Hao also sent this piece of popular science tips. One question and one answer, clarity and content. Constituting “Sisterhood” with the above.