以下为句子列表：
英文: During the course of our research in the early 1990s, we searched in vain to find sources of data on actual UV radiation levels at the earth's surface.
中文: 我们在1990年代初期的研究过程中，没找到地球各地紫外线辐射的实测资料。
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英文: It is widely accepted that environmental exposure to high levels of solar UV radiation contributes to the accelerated ageing of the outer layers of the eye and skin, and the development of cataracts.
中文: 已被公认的,是处于高剂量的太阳紫外幅射环境,可使眼睛及皮肤外层加速老化,并会引致白内障.
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英文: Large amounts of UV radiation damage the DNA in skin cells and can even lead to skin cancer. Sunscreen protection should begin during the car trip to the holiday destination.
中文: 大量的紫外线照射损害皮肤细胞的DNA甚至会导致皮肤癌。我们应该从旅行开始到度假目的地进行全程遮光保护。
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英文: THE EARLIEST MEMBERS of Homo sapiens, or modern humans, evolved in Africa between 120,000 and 100,000 years ago and had darkly pigmented skin adapted to the conditions of UV radiation and heat that existed near the equator.
中文: 智人（现代人）最早的成员是10~12万年前在非洲演化出来的，他们适应赤道附近的紫外线与炎热条件，已经演化出黑色皮肤。
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英文: U rotected skin exposed（12） to UV radiation generates（13） harmful compounds（14） called reactive oxygen ecies（15） or ROS.
中文: 暴露在紫外线辐射下的无保护的皮肤会产生叫活性氧簇（ROS）的有害化合物。
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