Speaking of the word "concrete", it is really a bit of a talk. The "concrete" often written on the construction site is actually concrete, which has the same pronunciation as "copper". This word has not existed since ancient times, but was created by Cai Fangyin, a Tsinghua student, in 1953. Take it apart, it is "people, workers, stone", implying that concrete is artificial stone. At that time, there was no computer to write "concrete" to 30 paintings, replaced by "concrete" as long as 10 paintings, greatly facilitating engineers to take notes and draw drawings. In 1985, it was officially approved as a special word for civil engineering. One word hides the wisdom and romance of generations of engineers.
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