a 2 d
网络释义
a 2 d cad software 二维绘图软件
a 2 d unsteady flow 平面二维非恒定流
a 2 d numerical model 二维水流数学模型
a 2 d mathematical model 平面二维数学模型
a 2 d sudden-expansion flow 二维突扩流
a 2-d heteronuclear coordination polymer 二维异核配位聚合物
双语例句原声例句权威例句
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Preserving accuracy when using a 2-d map requires understanding spatial reference systems and using them appropriately.
使用2 - d地图时保持精确度需要理解空间引用系统并合理使用。
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The first is an implementation of a 2-d cellular automaton that implements the forest-fire model.
第一个是一个实现森林火灾模型的2 - d元胞自动机实现。
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The second part of a spatial reference system is its projection, which defines how to lay out the Earth surface onto a 2-d surface.
空间引用系统的第二部分是投影，它定义了如何将地球表面放置在2 - d平面上。
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Again I should have said first, index 0, the first one. I can similarly go in and say I'd like all the things between index 2 and index 4. And again, remember what a b c that does. Index 2 says start a 0. 1, 2. So a, b, c.
我还是要说一遍，索引为0的元素，是第一个元素，我可以要求返回索引,2和4之前的所有元素，请记住2,是从0开始的,那么0，1，2对应的是。
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You can take a derivative of the derivative and you can get the acceleration vector, will be d^2r over dt^2, and you can also write it as dv over dt.
你可以对导数再求一次导,你就可以得到加速度矢量,也就是 d^2 r / dt^2,你也可以写成 dv / dt
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You wouldn't be expected to be able to guess that this would happen, because using any kind of simple theory, we would, in fact, predict that this would not be the case, but what we find experimentally is that it's more stable to have half filled d orbital than to have a 4 s 2, and a 3 d 4.
你们不用预期有能力,猜出这个会发生，因为使用任一种简单的理论，我们事实上可以预测不会是那种情况，但是我们在实验中发现的,是半填充d轨道比,4s23d4更加稳定。
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