The open rectangles represent typical elements of the ion fluid. 空心的矩形表示典型的離子流體元。
Generally, one approximates a blockbody in the laboratory by a hollow insulated enclosure which contains a small hole in the wall. 一般地說，人們在實驗室中用壁上帶有一個小孔的空心絕緣殼來近似模擬一個黑體。
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