为了调查由此产生的影响，克莱门茨和其研究小组选取了十几条山间溪流，将遮盖板放置在溪流的某一段以阻挡紫外线对溪床的照射。
To investigate this effect, Clements and his team placed screens over small segments of a dozen mountain streams to block ultraviolet light, and left them there for 60 days.
睡眠是一门艺术——谁也无法阻挡我追求艺术的脚步！
Sleep is an art - no one can stop me from pursuing the footsteps of art!
铅门主要用于需阻挡射线通过的进出口，常用于医院、机房和矿区中。
Lead door is mainly used for blocking the radiation through the import and export, commonly used in the hospital room, and in mining area.
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