安徽农业大学吧大学生2分钟英语演讲稿精选范文_演讲稿

大学生

2

分钟英语演讲稿精选范文

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

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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.

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%

。

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

O mega-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。

篇二

Ladies and Gentlemen, Good afternoon!

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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

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