鸡蛋壳,我们再熟悉不过了。有人曾以“不值一个空蛋壳的钱”来形容一个物品的廉价,同时也反映出人们对蛋壳价值的轻蔑态度。可是,你是否想过,小小的蛋壳,却在建筑业上为人们做出了很大的贡献。不知你是否有这样的体验,当你用手捏鸡蛋时,用很大的力气,却不容易捏碎它。有人对鸡 Egg shell, we are familiar with it. Someone once described the cheapness of an item as “not worth an empty eggshell”, and it also reflects people’s contempt for eggshell value. However, have you ever thought that small eggshells have made a great contribution to people in the construction industry. I do not know if you have such an experience, when you use your hand to squeeze the egg, with great strength, but it is not easy to crumple it. Someone is chicken