海底巧匠建房妙你们见过建筑工人盖高楼吧,他们总是先打地基,再一层层地往上盖,最后封顶。可是有一类“建筑工人”却是倒过来,它是谁呢?海螺就是这类建筑工人。它在很小的时候,为保护身体的外套膜,就会分泌“建筑材料”——碳酸钙,大约1年的工夫,楼房的顶层就建好了,可是,小孩? The submarine craftsmen built houses and you had seen construction workers cover tall buildings. They always hit the ground first, then covered them in layers and finally capped. However, there is a category of “construction workers” who are upside down. Who is it? Conch is such a construction worker. When it was very young, to protect the body’s mantle, it would secrete “building materials”—calcium carbonate. After about a year, the top floor of the building was built, but what about children?