个人最新演讲全文英文版
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个人最新演讲全文英文版1
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 e_perts now believe that up to two-thirds of all cancers come from lifestyle factors such as smoking, diet and lack of e_ercise.
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 cycloo_ygenase-2 or co_-2 enzyme. co_-2 affects inflammation, which may play a role in tumour growth.
个人最新演讲全文英文版2
if you're middle-aged and your memory's not what it used to be, check the bathroom scale, researchers warned, suggesting overweight people tend to score more poorly on tests of memory than their thinner peers do.
the findings suggest that a heavier weight in middle age may mean a higher risk of dementia later in life.
reporting in the journal neurology, the researchers speculated that higher rates of cardiovascular disease or diabetes might help e_plain the link. but it's also possible that substances produced by fat cells, such as the hormone leptin, have direct effects on the brain.
the study compared mental abilities to body mass inde_ (bmi), a
measurement of weight in relation to height used to define overweight and obesity. a bmi of 25 or more indicates overweight, and 30 or more is obese.
the study also investigated the relationships between bmi and cognitive function in 2,223 healthy men and women between the ages of 32 and 62 in france through the use of four cognitive tests.
the study found a higher bmi was associated with lower cognitive test scores. results from a test involving word memory recall show people with a bmi of 20 remembered an average of nine out of 16 words, while people with a bmi of 30 remembered an average of seven out of 16 words.
个人最新演讲全文英文版3
people who do not get enough sleep are more than twice as likely to die of heart disease, according to a large british study released monday.
although the reasons are unclear, researchers said lack of sleep appeared to be linked to increased blood pressure, which is known to raise the risk of heart attacks and stroke.
a 17-year analysis of 10,000 government workers showed those who cut their sleep from seven hours a night to five or less faced a 1.7-fold increased risk of death from all causes and more than double the risk of cardiovascular death.
the findings highlight a danger in busy modern lifestyles, francesco cappuccio, professor of cardiovascular medicine at the university of
warwick's medical school, told the annual conference of the british sleep society in cambridge.
"a third of the population of the uk and over 40 percent in the us regularly sleep less than five hours a night, so it is not a trivial problem," he told reporters.
previous research has highlighted the potential health risks of shift work and disrupted sleep. but the study by cappuccio and colleagues, which was
supported by british government and us funding, is the first to link duration of sleep and mortality rates.
the study looked at sleep patterns of participants aged 35-55 at two points in their lives - 1985-88 and 1992-93 - and then tracked their mortality rates until __.
the results were adjusted to take account of other possible risk factors such as initial age, se_, smoking and alcohol consumption, body mass inde_, blood pressure and cholesterol.
cappuccio said it was possible that longer sleeping could be related to other health problems such as depression or cancer-related fatigue.
个人最新演讲全文英文版4
christmas arouses increasing attention year by year in china. christmas cards become popular with students. people hold christmas parties and e_change christmas girts. a lot or tv and radio programs about christmas are on. meanwhile the spring festival is less appealing (有吸引力的)to youngsters. thus some people wonder whether christmas will replace the spring festival.
this worry is fairly unnecessary. why ? one reason lies that christmas only affects christians，college students and joint-venture (合资企业)workers. another reason is that christmas is mostly celebrated in cities. few people in countryside show e_treme interest in this e_otic(带有异国情调的) festival. by contrast，the spring festival is the most influential traditional festival in every family.
i think，it is natural that with increasing e_changes with the west，a lot of western holidays have been gradually introduced into china. for us chinese we should never neglect or even discard our own traditional festivals. for centuries chinese have observed this traditional holiday to welcome the beginning of a new year. and we will treasure the spring festival forever.
个人最新演讲全文英文版5
i have received many presents when i have my eleven birthday party.
my parents give me a teddy bear, my uncle gives me a book. my best friend gives me a goldfish. among all the gifts, i love the goldfish the most.
i always want to have a pet in the family, but my parents don’t allow me to keep one. now i have my own goldfish. i will keep it and take good care of it. this goldfish is very beautiful. its colour is pink. i love watching it swimming in the water.
sometimes, i will feed it. i wish it can grow up with me. this is the best birthday present ever!
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