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ossible!amp。quot。 but not without sweat, devotion, and tears sometimes! life is a long journey, during which we are surely going to face many challenges, experience lots of failures, and equally, many opportunities are waving to us, while sweet rewards are waiting for us! to transform these opportunities into fruitful results, or turn those challenges and failures into valuable assets, we must learn to seize the good ones and not to retreat lightly in front of difficulties. winners can never be quitters! thank you all! 中學生英語演講稿關(guān)愛大自然 中學演講稿(3) caring for natureoverpopulation what is nature? its everything that exists in the world independently of people, such as pants and animals, earth and rocks, and the weather. now more and more people are focusing on the nature. it is no doubt that the nature is important to every human being. no nature, no life. because of the supplies of the nature, we have lived happily for a long time. and we started to gain every thing available from the nature. and this lasted so long a time. today, people have discovered that the nature around is getting worse and worse. what is threatening the nature? air and water pollution, overharvesting of plant and animal species, overpopulation and so on. overpopulation is the biggest source of pollution. lets take overpopulation as an example. what does overpopulation feel like? when we move slowly through the city in a tazi. when we enter a crowded slum district. when the temperature is high and when the air is thick with dust and smoke. the streets are crowded with people. the streets seem alive with p