我觉得您说的是两回事儿。presentation一般是指带有ppt演示的讲话，3-4分钟的演说只是一个speech,不会有ppt演示。
到底是什么？
When you walk in the broad road to enjoy the flowers next to the tree, suddenly assail the nostrils smell from the sewage smell, you do not think you sick? When you walk in the golden beach, the sea breeze blowing You feel very comfortable, all of a sudden a plastic bag flew to your face, you do not think it disappointing?
Human development in a long road, whether natural or carry out economic development, has created a brilliant performance. At the same time, however, because of the unreasonable development and utilization of natural resources, not pay attention to environmental protection, creating a global environmental pollution and ecological damage. Now the world each year 6,000,000 hectares of land become desert, 20,000,000 hectares of forest disappear in an average of one hour in the extinction of a species. Since the destruction of the ozone layer, the greenhouse effect in increasing the right to use the Earth's rising temperatures, melting Antarctic ice cap to start, sea-level rise will continue, many of the world's coastal cities, islands and a large amount of land will be swallowed by the sea. This series of environmental problems not only affect the economic development and social progress and even threaten its very survival, so the environment has become a common concern of all mankind.
Students, the importance of protecting the environment. If in the process of economic development not pay attention to environmental protection, they are subject to nature's revenge. Not only damage our generation, but also detrimental to our future generations!
Students, we are the masters of the planet's small, each of us should have a small sense of environmental protection. Environmental protection is the responsibility incumbent upon all of us. We must now start from the starting side, from the little things: a tree love flowers, love birds and other small animals, and so on. Through our efforts to make the sky bluer of the motherland, and more green and water clearer.
My college life
I am proud of being a college student. I like my college life as it is so wonderful time in my youth. As being born in small village of the remote countryside, I didn't have a good education environment. However, I set a goal and felt confident to be a college student. After hard study, I passed the entrance examination of national college by excellent achievement. All people were proud of me, as I was the first college student in my village. I was farewell warmly by them when I came to school. I was warmly welcome by school, too. After then, I’ve felt my study is not only for myself but also for the honor of my village neighborhood and our school.
The college life is wonderful. All life in school are fresh. New teachers, new classmates and fresh friends are around me. I’ve felt their friendship, wide knowledge and opening mind. The grand library, school buildings and wide playground are very attracting to me. I am very eager to learn much knowledge quickly. In high school, I was ever called as a runner before time. Now,I know I am behind time so much in fact. I hope to catch up with the time by my hard studying. Every day, you can see me get up early, doing exercise hard and go to school the first one. At night, I am the one who leaves away the library. The most interesting thing is that I can’t speak the PUTONGHUA well and made many funny events at the beginning， as I am from South. When I entered the classroom at first time, I was headache as I couldn’t understand what the professor was speaking. I met much difficulties at math, physics and other courses, even though I used to be good at these sciences. Therefore, I learn these courses myself after class. After three months, the exmination indicated that I overcame all the difficlties. I also improved my listening and spoken ability of Chinese quickly. Communication is very important to my college life. I study English hard as well. It makes me have many chances to communicate with foreigners. I made friends with many foreign teachers and students. From them, I learn many knowledge about foreign cultures. The computer room is another place I like to staying. I contact the outside world by the internet. All the News, advance science, and the information about internal and outside of China.
Besides study, my college life is also very colorful. I’d like to take any chance to improve my communication skill. I am the monitor and playing an active role in class and school. Last year, I organized a speech match in management department. All the classmates were very interested in this kind of activity. I learned from them much about their hometown, their knowledge and opinions. At the same time, I shew my beautiful hometown to everyone. In school, I take care all the classmates around me. I am so poor due to from the romote countryside. The school pay most the fee for my education. I feel very happy. However, I know some classmates are poorer than me. I am willing to care them and encourage each other.
My college life is long and short. I believe that I can spend a good time in the four years. I hope I will have no any regretion when I look back the short youth of college in the future.
希望对你有帮助...稍微做一点修改就OK吧
个人认为挺不错的演讲稿~~~
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