网络释义专业释义
d region d区
d-region stability d域稳定性
d-region d层
D - region D区
2-d region 二维区域
3-d region 三维区域
type D region D型区域
d region search 三维区域搜索
柯林斯英汉双解大词典
D region (also D layer)
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1.
N the lowest region of the ionosphere, extending from a height of about 60 kilometres to about 90 kilometres: contains a low concentration of free electrons and reflects low-frequency radio waves D域; 电离层的最低区域 → see also ionosphere
双语例句原声例句
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And, that's true for any region, d, not just for some regions, but for, really, any region I can think of.
这对任意区域D都成立，在能想到的区域都成立。
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Let me call that region D of divergence, of curl F dV.
称之为在区域D上divdV的积分。
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D It is really completely enclosing a region in space that I will call D.
在空间中是完全封闭的，我们称它为。
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