Phát âm chuẩn – Anh ngữ đặc biệt: Allergy Fighting Material (VOA)

Học tiếng Anh hiệu quả, nhanh chóng: http://www.facebook.com/HocTiengAnhVOA, http://www.voatiengviet.com/section/hoc-tieng-anh/2693.html. Nếu không vào được VOA, xin hãy vào http://vn3000.com để vượt tường lửa. Các chương trình học tiếng Anh miễn phí của VOA (VOA Learning English for Vietnamese) có thể giúp bạn cải tiến kỹ năng nghe và phát âm, hiểu rõ cấu trúc ngữ pháp, và sử dụng Anh ngữ một cách chính xác. Xem thêm: http://www.facebook.com/VOATiengViet

Luyện nghe nói và học từ vựng tiếng Anh qua video. Xem các bài học kế tiếp: https://www.youtube.com/playlist?list=PLD7C5CB40C5FF0531

Tech: Luyện nghe nói tiếng Anh qua video: Chương trình học tiếng Anh của VOA: Special English Technology Report. Xin hãy vào http://www.voatiengviet.com/section/hoc-tieng-anh/2693.html để xem các bài kế tiếp.

Many people around the world suffer from dust-related allergies. People with allergies have trouble breathing or suffer from tightness in the chest and shortness of breath. Some allergies result from very small animals called dust mites. Dust mites live in bedding. Now, scientists in Poland say they have successfully tested cloth that blocks the microscopic animals. Most of us share our beds with thousands of dust mites. Each mite is just one-third of a millimeter wide. Along with dust around the home, we breathe in waste from these creatures. The waste contains enzymes called proteases. They produce chemical reactions in the body which can lead to breathlessness, coughing or severe asthma attacks. Dust mites are hard to remove because they can easily pass through small openings in bedding. But that is not the case with the new material developed at the Medical University of Lodz in Poland. Air can pass through the material but dust mites cannot. People who tested the cloth say their allergic symptoms were greatly reduced. They say they can finally sleep normally. Researchers say repeated washings did not reduce the anti-allergic quality of the new fabric. More testing must be done before the material will be ready for market. Until then, people who suffer from dust allergies are advised to keep their homes dry, clean their floors often and wash their bed sheets in hot water.

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