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The nebula glows because of ultraviolet radiation from the hot remnant star at its center.
星云的膨胀是因为受到来自中心热恒星遗迹的紫外辐射.
网络文摘精选
The tuffaceous formation , isolated remnants, are about 200-250 ft thick.
凝灰岩构造的局部残存段的厚度约为 200-250 ?铡?
词典精选例句
The nebula glows because of ultraviolet radiation from the hot remnant star at its center.
星云的膨胀是因为受到来自中心热恒星遗迹的紫外辐射.
网络文摘精选
The tuffaceous formation , isolated remnants, are about 200-250 ft thick.
凝灰岩构造的局部残存段的厚度约为 200-250 ?铡?
词典精选例句
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