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为了说明钢轨之所以制成工字形的道理,我们不妨先从《墨经》和伽利略讲起。《墨经》是我国古代论及光学、力学等自然科学的名著之一,其中某些内容或与材料的强度问题有关。由于后人对原文的考证和理解不同,因而存在各种各样的注释。例如,取某段引文为“均发均悬,轻重而发绝,不均也。均,其绝也莫绝。”然后翻译成:用头发悬挂重物,头发要均匀,挂得也要均匀。如果重物很轻头发就断了,这是不均匀的缘故。要是均匀的话,那么原来要断的头发也不会断了。由此说明,我们的祖先早
In order to explain the reason why rails are made in an I-shape, we may wish to start with the “Ink” and Galileo. “Movie Classics” is one of the masterpieces of natural sciences in optics, mechanics, and other natural sciences in China. Some of them are related to the strength of materials. Due to differences in the textual research and understanding of later generations, there are various annotations. For example, take a quotation as “All hairs are hanging, heavy and fat, and inevitably, evenly, they must not be rejected.” Then translated into: Hang heavy objects with hair, hair should be uniform, evenly hung . If the weight is very light and the hair is broken, this is a non-uniform reason. If it is even, then the hair that is going to break will not break. This shows that our ancestors were early