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Some plants are very picky when choosing pollinators. The flowers of European Trollius are like a real safe deposit box, and only six kinds of insects know the code to open the safe deposit box. These lucky people all come from the genus Brevicorn. Only they know how to get into the sepals of European Trollius and find the center of the flower. However, no matter how hard other insects try, they can only fail with disappointment. The short-horned flower fly, which has gone to great pains to pollinate European Trollius, will naturally receive considerable "remuneration". Female short-horned flower flies lay eggs on the carpels of flowers. When the larvae are hatched, they will eat the seeds of flowers and grow up. This symbiotic relationship also has certain risks for European Trollius. The more short-horned flower flies, the greater the chance of pollination, but at the same time, the more insects parasitic on flowers. The cooperative relationship between the two was formed millions of years ago and continues to this day. It is a model of relative balance and harmonious symbiosis in nature.很快他就看到一篇文章。Do you admire the old man in this article? Why?How to answer such questions? Consistent Zhihu style, the following various statements have, but the top one is actor Zhang Yi's answer (of course, there are reasons why he is a celebrity), but his answer is as follows:这是国共两党在大中国的范畴内不断相互斗争、试探、接触的历史。国共两个情报人员（黄以轩、孙世安）在相互欣赏的前提下，持续几十年的渗透、颠覆和窃取，斗争在情报工作的前沿，乃至延续到了下一辈间的相互策反。他们由争夺载满国军军资的商船“大丰号”，结下血海深仇。CBS宣布续订《联邦调查局》第3季。