For UK viewers, be sure to keep an eye open for Mark on the BBC, he is one of the most knowledgeable and entertaining on-screen UK astronomy talents I've seen for many years.
英国观众们，你们可千万别错过马克在BBC上的节目啊。他是我见过的知识最渊博、最富有娱乐性的英国顶尖天文学专家之一。
Some of the most spectacular night skies are visible to the naked eye - although sadly not from the UK.
一些最耀眼的夜空可以用肉眼看到——但很可惜不在英国。
A simple eye test might be able to detect Alzheimer's and other diseases before symptoms develop, according to UK scientists.
英国科学家透露，一项简单的眼部测试就可能在病症恶化之前检测出老年痴呆症和其它疾病。
Everywhere in the house there will be microscopic mould allergens, unable to be seen by the naked eye, warn the experts at Allergy UK.
英国过敏症研究专家警告说，在室内，到处充满了只有用显微镜才能观察到的发霉的过敏原，而这些过敏原是无法用肉眼识别的。
Everywhere in the house there will be microscopic mould allergens, unable to be seen by the naked eye, warn the experts at Allergy UK.
英国过敏症研究专家警告说，在室内，到处充满了只有用显微镜才能观察到的发霉的过敏原，而这些过敏原是无法用肉眼识别的。
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