大学生2分钟英语演讲稿精选范文

人学生2分钟英语演讲稿精选范文

Soy food good for wome n

Wome n who ate soy regularly as childre n have a lower risk of breast can cer, America n researchers report. And men who eat fish several times

a week have a lower risk of colon can cer, a sec ond team of researchers have told the America n Associati on for Can cer Research.

The studies add to a grow ing body of evide nee 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 smok ing, diet and lack of exercise.

The US Nati onal Can cer In stitute and researchers at the Un iversity

of Hawaii found that womerwho ate the most soy-based foods, such as tofu and miso, whenaged 5 to 11, reduced their risk of developing breast cancer by 58 per cent. It was not clear how soy might prevent cancer, though compo unds in soy called isoflav ones have estroge n-like effects.

A sec ond 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 tha n once a week.

Many kinds of fish are rich in omega-3 fatty acids, which interfere

with the cyclooxyge nase-2 or COX-2 en zyme. COX-2 affects in flammati on,

which may play a role in tumour growth.

据美国研究人员报告，儿童时期经常吃豆类食品的女性患乳腺癌的风险较小。另一组研究人员则向美国癌症研究协会提出，一周吃几次鱼的男性患结肠癌

的几率较小。

这两项研究进一步证明了饮食对于防癌的作用。癌症防治专家认为，在所有种类的癌症中，多达三分之二都是由吸烟、节食及缺乏锻炼等不健康的生活方式造成的。

美国全国癌症研究所和夏威夷大学的研究人员发现，在5岁至11岁时经常吃豆腐、味噌等豆类食品的女性患乳腺癌的几率要低58%至于豆类食品为什么

可以防癌还不清楚，不过大豆中所含的名叫异黄酮的化合物具有雌性激素的作用。

另一项研究表明，一周吃鱼至少五次的男性患结肠癌的风险要比那些一周都吃不到一次鱼的男性低40%很多鱼类中所富含的Omega-3脂肪酸能够抑制环氧化酶2的活性。环氧化酶2会引起发炎，这可能会刺激肿瘤的生长。

Ladies and Gen tleme n. Good after noon!

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 importanee in your youth so that more cherish it.

First I want to ask you some questi ons:

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 fresh ness ; it is the fresh ness of the deep spri ngs of life .

Youth meansa 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 tha n a boy of 20 . Nobody grows old merely by a nu mber of years. We grow old by desert ing 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 huma n being ‘ s heart the lure of wonders, the unfailing childlike appetite of what's next and the joy

of the game of liv ing .In the cen ter 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.

Tha nk you!

青春

青春不是指岁月，而是指心态。粉嫩的脸，红润的唇，矫健的膝并不是青春。青春表现在意志的坚强与懦弱。想象的丰富与苍白、情感的充沛与贫乏等方面。青春是生命深处清泉的喷涌。

青春是追求。只有当勇气盖过怯弱、进取压倒苟安之时，青春才存在。果如此，