As the seasons change, dengue outbreaks have begun to emerge in Pakistan, which is already struggling with infectious diseases such as tuberculosis and polio. Hospitals in major cities are not only ...

科学家们说，近年来，南极野生动植物暴露在紫外线辐射中的时间有所增加，原因是臭氧层空洞在南极地区上空的时间更长了。臭氧层是地球上层大气中的气体保护屏障。 The ozone layer is healing, but it'll take until about the end of the century to restore completely. In Antarctica, the ...

作为提高安全保障措施中的一部分，英国国家障碍赛马大赛的参赛人数从40人减少到34人。 The Grand National, regarded by many as the world's most famous horse race, features jockeys and horses negotiating 30 fences over more than four miles, and ...