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!
睡眠是一门艺术——谁也不能阻挡我追求艺术的脚步。
Sleeping is an art — nobody should be in my way of pursuing this art.
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