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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.Ghost drug G7留美回国的钢琴女老师李娜被网络大咖梅云婷邀请为她自闭症的外甥女做家教，发现梅云婷现任男友就是自己青梅竹马初恋谷峰，李娜背着一起美国留学现任男友郑凯和谷峰一次次的幽会，却被博爱善良的梅云婷和正直的郑凯发现，四人在爱情，友情，亲情，激情和各种误解，背叛，憎恨与宽恕交集的背景下，他们各自选择自己不同真爱和坚守道德底线禁区。二儿子白杰因砍伤黑帮老大周龙换来十年牢狱生活，出狱后的白杰本想好好做人，然而却不断遭到周龙的暗算和陷害，这让一家人跟着他操心不已；Article 9 Narrow waterways郑氏点头，难怪他们在京城名气这么大，还能生存，因为他们只守住自己的顾客群，求得是一个老字号。她正要问板栗这时候能不能逮到山蛙，忽觉右手一空。