大學生2分鐘英語演講稿精選范文
篇一
Soy food good for women
Women who ate soy regularly as children have a lower risk of breast cancer, American researchers report. And men who eat fish several times a week have a lower risk of colon cancer, a second team of researchers have told the American Association for Cancer Research.
The studies add to a growing body of evidence about the role of diet in cancer. Cancer experts now believe that up to two-thirds of all cancers come from lifestyle factors such as smoking, diet and lack of exercise.
The US National Cancer Institute and researchers at the University of Hawaii found that women who ate the most soy-based foods, such as tofu and miso, when aged 5 to 11, reduced their risk of developing breast cancer by 58 per cent. It was not clear how soy might prevent cancer, though compounds in soy called isoflavones have estrogen-like effects.
A second study showed that men who ate fish at least five times a week had a 40 per cent lower risk of developing colorectal cancer compared with men who ate fish less than once a week.
Many kinds of fish are rich in omega-3 fatty acids, which interfere with the cyclooxygenase-2 or COX-2 enzyme. COX-2 affects inflammation, which may play a role in tumour growth.
據(jù)美國研究人員報告，兒童時期經(jīng)常吃豆類食品的女性患乳腺癌的風險較小。另一組研究人員則向美國癌癥研究協(xié)會提出，一周吃幾次魚的男性患結(jié)腸癌的幾率較小。
這兩項研究進一步證明了飲食對于防癌的作用。癌癥防治專家認為，在所有種類的癌癥中，多達三分之二都是由吸煙、節(jié)食及缺乏鍛煉等不健康的生活方式造成的。
美國全國癌癥研究所和夏威夷大學的研究人員發(fā)現(xiàn)，在5歲至11歲時經(jīng)常吃豆腐、味噌等豆類食品的女性患乳腺癌的幾率要低58%。至于豆類食品為什么可以防癌還不清楚，不過大豆中所含的名叫異黃酮的化合物具有雌性激素的作用。
另一項研究表明，一周吃魚至少五次的男性患結(jié)腸癌的風險要比那些一周都吃不到一次魚的男性低40%。很多魚類中所富含的Omega-3脂肪酸能夠抑制環(huán)氧化酶2的活性。環(huán)氧化酶2會引起發(fā)炎，這可能會刺激腫瘤的生長。
篇二
Ladies and Gentlemen, Good afternoon!
I’m very glad to stand here and give you a short speech. Today my topic is “youth”. I hope you will like it, and found the importance in your youth so that more cherish it.
First I want to ask you some questions:
1、Do you know what is youth? 2、How do you master your youth?
Youth
Youth is not a time of life, it is a state of mind; it is not rosy cheeks , red lips and supple knees, it is a matter of the emotions : it is the freshness ; it is the freshness of the deep springs of life .
Youth means a temperamental predominance of courage over timidity of the appetite, for adventure over the love of ease. This often exists in a man of 60 more than a boy of 20 . Nobody grows old merely by a number of years. We grow old by deserting our ideals.
Years wrinkle the skin, but to give up enthusiasm wrinkles the soul. Worry, fear, self –distrust bows the heart and turns the spirit back to dust.
Whether 60 of 16, there is in every human being ‘s heart the lure of wonders, the unfailing childlike appetite of what’s next and the joy of the game of living . In the center of your heart and my heart there’s a wireless station: so long as it receives messages of beauty, hope ,cheer, courage and power from men and from the infinite, so long as you are young .
When the aerials are down, and your spirit is covered with snows of cynicism and the ice of pessimism, then you are grown old ,even at 20 , but as long as your aerials are up ,to catch waves of optimism , there is hope you may die young at 80.
Thank you!
青春
青春不是指歲月，而是指心態(tài)。粉嫩的臉，紅潤的唇，矯健的膝并不是青春。青春表現(xiàn)在意志的堅強與懦弱。想象的豐富與蒼白、情感的充沛與貧乏等方面。青春是生命深處清泉的.噴涌。
青春是追求。只有當勇氣蓋過怯弱、進取壓倒茍安之時，青春才存在。果如此，則60見之長者比20歲之少年更具青春活力。僅僅歲月的流逝并不能使他們衰老。而一旦拋棄理想和信念，則垂垂老也。
歲月只能使皮膚起皺。而一旦喪失生活的激情，則連靈魂枯老，使人生枯如死水，毫無活力。 60歲長者也好，16歲少年也罷，每個人的內(nèi)心深處都渴望奇跡，都如孩子一般眨著期待的雙眼，期待著下一次，期待著生活的情趣，你我靈魂深處都有一座無線電中轉(zhuǎn)站------只有你我年輕，則總能聽到希望的呼喚，總能發(fā)出喜悅的歡呼，總能傳達勇氣的訊號，總能表現(xiàn)出青春的活力„„„
一旦青春的天線倒下，你的靈魂即為玩世不恭之雪、悲觀厭世之冰覆蓋;即使你年方
20.其實你已垂垂老也。而只要你青春的天線高高聳起，就可以隨時接收到樂觀的電波-----即使你年過八旬，行將就木，而你卻仍然擁有青春，你仍然年輕。
謝謝!
篇三
Saying goodbye to childhood,we step into another important time in the pace of young,facing new situations,dealing with different problems.....
everyone has his ownunderstanding of young,it is a period of time of beauty and wonders,only after you have
experienced the sour ,sweet ,bitter and salty can you really become a person of significance.thre time of young is limitted,it may pass by without your attention,and when you discover what has happened ,it is always too late.grasping the young well means a better time is waiting for you in the near future,or the situation may be opposite .
having a view on these great men in the history of hunmanbeing,they all made full use of their youth time ,to do things that are useful to society,to the whole mankind,and as a cosquence ,they are remembered by later
generations,admired by everyone.so do something in the time of young,although you may not get achievements as these greatmen did ,though not for the whole word,just for youeself,for those around!
the young is just like blooming flowers,they are so beautiful when blooming,they make people feel happy,but with time passing by,after they withers ,moet people think they are ugly.and so it is the same with young,we are enthusiastic when we are young,then we may lose our passion when getting older and older.so we must treasure it ,don't let the limitted time pass by ,leaving nothing of significance.
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