它的表面环绕了一层薄木板保持表面光滑，能够使它滚动起来，在侧面开口以及预订窗户能够让外部的光线照射进来。
Thin wooden slats circle the unit to provide a smooth running surface to roll it and openings on the side and slated Windows let light into the interior.
窄缝的设计是为了减少太阳光的照射而不是提亮外部结构。
The narrow crevices are designed to set off the darkness inside rather than emphasizing the brightness outside.
原子受到外部能源的照射而激发。
The atoms are excited by being irradiated with energy from an external source.
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