Large amounts of U radiation damage the DNA in skin cells and can een lead to skin cancer. Sunscreen protection should begin during the car trip to the holiday destination.是什么意思_Large amounts of U radiation damage the DNA in skin cells and can een lead to skin cancer. Sunscreen protection should begin during the car trip to the holiday destination.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句