单语范例（未经PONS编辑处理）
英语
- Prolonged exposure to natural or artificial sun light (UV rays) is not recommended because the gel can cause photosensitivity.en.wikipedia.org
- These materials are sensitive to vacuum UV and UV rays but not to visible light and are therefore referred to as solar blind.en.wikipedia.org
- They block 100% of UV rays and help to enhance contrast and reduce glare.en.wikipedia.org
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英语