ultraviolet background

例句：

1. 1. The scientist used a special filter to reduce the ultraviolet background in his experiments.
   这位科学家使用了一种特殊的过滤器来减少实验中的紫外线背景。
2. 2.The photoelectric effect is caused by the interaction of electrons with an ultraviolet background.
   光电效应是由电子与紫外线背景相互作用引起的。
3. 3.The research team focused on studying the effects of ultraviolet background on human health.
   研究团队专注于研究紫外线背景对人类健康的影响。