美国科学60秒 SSS 2012-11-29_在线英语听力室_免费在线英语听力学习网站

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Ticks are bad news. They spread Lyme disease and Rocky Mountain spotted¹ fever. And they’re also responsible for an unusual food allergy²—to meat. Yup, get bit by one of these buggers and it could be bye-bye BBQ.

The strange allergy has been linked to the particularly aggressive Lone³ Star tick. These tiny ticks are found primarily in the southeastern United States, the same place as most of the known cases of the meat allergy. Or so it seemed.

Researchers from Viracor-IBT, a company offering a diagnostic test for the allergy, found that the allergy is also appearing in places without the ticks—as far away as Hawaii. Experts aren’t entirely⁴ sure why. The ticks may be spreading, the allergy can possibly be triggered by other tick species or people are frequently getting bitten while traveling. The data was presented at the meeting of the American College of Allergy, Asthma⁵ and Immunology.

The bottom line? Regardless of where you live, if you’re going to be outdoors and you love meat, get out the DEET.

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收听单词发音

1 spotted
adj.有斑点的，斑纹的，弄污了的
参考例句：
The milkman selected the spotted cows,from among a herd of two hundred.牛奶商从一群200头牛中选出有斑点的牛。 Sam's shop stocks short spotted socks.山姆的商店屯积了有斑点的短袜。

2 allergy
n.(因食物、药物等而引起的)过敏症
参考例句：
He developed an allergy to pollen.他对花粉过敏。 The patient had an allergy to penicillin.该患者对青霉素过敏。

3 lone
adj.孤寂的，单独的；唯一的
参考例句：
A lone sea gull flew across the sky.一只孤独的海鸥在空中飞过。 She could see a lone figure on the deserted beach.她在空旷的海滩上能看到一个孤独的身影。

4 entirely
ad.全部地，完整地；完全地，彻底地
参考例句：
The fire was entirely caused by their neglect of duty. 那场火灾完全是由于他们失职而引起的。 His life was entirely given up to the educational work. 他的一生统统献给了教育工作。

5 asthma
n.气喘病，哮喘病
参考例句：
I think he's having an asthma attack.我想他现在是哮喘病发作了。 Its presence in allergic asthma is well known.它在过敏性气喘中的存在是大家很熟悉的。