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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.当下，池塘底下忙得热火朝天，一桶接一桶大鱼被提上岸。洪霖心里微微松了口气，面上依旧平静，轻声道：若是为这个。　　迪克·切尼号称是美国历史上最有权势的副总统，他也是现任美国副总统彭斯（Mike Pence）的效仿对象。布什当政八年时间里，表面上切尼是美国的二号人物，但实际上小布什总统（George W. Bush）的很多决定，包括阿富汗战争、入侵伊拉克等都是由他定夺的。4. (1) When ships can safely use the corresponding traffic separation in the adjacent traffic separation system area, the coastal navigation zone shall not be used. However, ships with a length of less than 20m, sailing boats and ships engaged in fishing can use coastal navigation zones.扬名世界的喜剧演员到家乡费城进行巡回演出，却被迫回答一个问题：为了守护他所拥有的一切，他愿意做到何种地步。《结婚的女神》讲述的是4对完全不同的情侣之间发生的故事。是信念与价值，人生观都不同的主角们，透过爱情与矛盾纠葛，了解在这个时代，结婚的意义与珍贵。在这里有四位女人：嫁给有钱人的女人；与外貌较好的男人结婚的女人；山下帐篷里不知所措，气氛异常却又无法逃避的境遇，与一开始就睡在一起的男人结婚的女人；以及推迟结婚时间，旅行途中遇到真正的爱情却不知如何是好的女人。到底，谁会成为“结婚的女神”？谁会嫁得最好？