Why + why 一般以第二个why为主
Why + what, what + why 以why 为主
Why + how 以why 为主 how (针对性 具体性 可行性)
What + why + how what (开头段) + why (主体) + how (结尾)
提到人的文章,可以从 环境,经济,文化,政治,科技,和医疗方面入手.
环境现状:
Prior to/ by the end of the late 1990s, a wide range of irresponsible human and industrial activities, as well as increasing social expansion/ urbanization, has gravely/ severely endangered/ wounded/ scarred the blue planet we call home and the already fragile/ weak/ gentle eco-system. To be more specific, the dependency on fossil fuels has produced the climate change, the worldwide greenhouse effect, El Nino, melting ice caps, rising sea levels, ozone depletion, crop failure; deforestation and the loss of wetlands for housing development and industrial factories has fundamentally uprooted the home of most wild species; the overuse of natural resources, especially in a wasteful manner, has at so many levels broken down a balanced environmental system; Industry waste made the valuable land, water system and air unusable. However, fortunately, the environmental groups, government offices, and concerned individuals, after years of efforts, are gradually and successfully promoting a green, eco-friendly lifestyle, the importance of recycling, almost stopping industrial pollution, illegal hunting and Japanese Whaling ships, and developing safer, greener, and more effective energy sources. For this reason, I am confident that it is not an overly optimistic future in 20 or 30 years when the rate of environmental degradation will be slowed down significantly.