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A．Light is not an essential element to it.B．Life can form. in very hot temperatures.C．
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A．It is something inevitable.B．It is frustrating sometimes.C．It takes patience to mana
Why doesn't Allegheny College plan to drop merit aid entirely？
Crystal Ear
One day a friend asked my wife Jill if I wanted a hearing aid. "He certainly does," replied Jill. After hearing about a remarkable new product, Jill finally got up the nerve to ask me if rd ever thought about getting a hearing aid. "No way," I said. "It would make me look 20 years older." "No, no," she replied. "This is entirely different. It's Crystal Earl"
Jill was right. Crystal Ear is different--not the old-styled body worn or over-the-ear aid, but an advanced personal sound system so small that it's like contacts (隐形眼镜) for your ears. And Crystal Ear is super-sensitive and powerful, too. You will hear sounds your ears have been missing for years. Crystal Ear will make speech louder, and the sound is pure and natural.
I couldn't believe how tiny it is. It is smaller than the tip of my little finger and it's almost invisible when worn. There are no wires, no behind-the-ear device. Put it in your ear and its ready-to-wear mold (形状) fits comfortably. Since it's not too loud or too tight, you may even forget that you're wearing in Use it at work or at play. And if your hearing problem is worse in certain situations, use Crystal Ear only when you need it.
Hearing loss, which occurs typically prior to teenage years, progresses throughout one's lifetime. Although hearing loss is now the world's number one health problem, nearly 90 percent of people suffering hearing loss choose to leave the problem untreated. For many millions, treating hearing loss in a conventional way can involve numerous office visits, expensive 'testing and adjustments to fit your ear. Thanks to Crystal Ear, the "sound solution" is now convenient. Almost 90 percent of people with mild hearing loss, and millions more with just a little hearing drop-off (下降), can be dramatically helped with Crystal Ear. Moreover, its superior design is energy-efficient, so batteries can last months. Crystal Ear is now available to help these people treat their hearing loss with a small hearing amplifier (放大器).
Initially the writer did not want to buy a hearing aid because
Global Cancer Rates to Rise by 50% by 2020
The number of new cancer cases worldwide is expected to increase by 50% by the year 2020. But a new report suggests that as many as a third of new cancers could be avoided by adopting healthier lifestyles and through public health action.
The World Cancer Report, released by the International Agency for Research on Cancer, shows that cancer has now emerged as a major public health threat in developing countries as well as rich ones.
Overall, cancer was responsible for 12% of all deaths in 2000. But in many countries more than a quarter of all deaths are caused by cancer.
The report shows that 10 million new cancers were diagnosed globally in 2000, and that number is expected to rise to 15 million by 2020. Researchers say most of that increase will mainly be due to steadily aging populations in both developed and developing countries and current trends in smoking and other unhealthy habits.
"Cancer has emerged as a major public health problem in developing countries for the first time, matching its effect in industrialized (工业化的) countries," said researcher Paul Kleihues, MD, director of IARC, in a news release. "Once considered a 'Western' disease, the Report highlights that more than 50 percent of the world's cancer burden, in terms of both numbers of cases and deaths, already occurs in developing countries."
The risk of being diagnosed with cancer in developed countries is double that in less-developed ones. However, the risk of dying from cancer is much higher in developing countries, where 80% of cancer patients already have late-stage incurable tumors (肿瘤) at the time of diagnosis.
Researchers say cancer rates have traditionally been higher in developed countries due to greater exposure to tobacco, occupational carcinogens (致瘤物), and an unhealthy Western diet and lifestyle. As less-developed countries become industrialized and more prosperous, they tend to adopt the high-fat diet and low physical activity levels typically seen in the West, which increase cancer rates.
The report says that steps could be taken to reduce about
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