这是一篇富有吸引力的说明文。蜘蛛本是人们习见的昆虫,行文着墨去说明介绍它,似乎没有什么必要,也是相当难于下笔的。难就难在人们既常见蜘蛛,却又知之甚少。若象昆虫学那样去写,知识性是强了,但又缺乏了通俗性,起不到这样一篇科学小品文应起的作用。作者却从自己细致的观察,一步一步引导读者去观察,或整理过去观察所得关于蜘蛛的知识,同时又浅近地介绍一些新知识,使读者如对友人闲话,于不知不觉中获得了知识。所以本文既有丰富的知识性,又有浓郁的趣味性。 This is an attractive illustration. Spiders are common insects for humans. It seems that there is no need to write ink to illustrate and introduce it. It is also quite difficult to write down. Difficulties are hard to find in people where spiders are common but little is known. If you write like entomology, knowledge is strong, but it lacks popularity, and it does not have the effect that such a scientific essay should play. The author observes his own carefully, and guides the reader step by step to observe, or sorts out the knowledge of spiders in past observations. At the same time, he introduces some new knowledge in a shallow manner, so that if the readers gossip on their friends, they gain knowledge without knowing it. Therefore, this article has both rich knowledge and rich interest.