The colliding galaxies would have created a powerful density wave that would have swept out the material into an expanding ring, stimulating star formation.

碰撞的两个星系产生了强烈的密度波，把物质推到外侧的环形上，并激发了恒星的形成。

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In this paper we discuss the spiral structure of dish galaxies in three-dimension according to the density wave theory.

本文从密度波理论出发，讨论三维盘状星系的旋臂结构。

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Doping can excite a charge density wave weakening the spin density wave against the stability of the ferromagnetic state.

掺杂能激发电荷密度波，从而削弱了自旋密度波，最终不利于铁磁态的稳定。

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We can talk about the wave function squared, the probability density, or we can talk about the radial probability distribution.

我们可以讨论它,波函数的平方，概率密度，或者可以考虑它的径向概率分布。

麻省理工公开课 - 化学原理课程节选

But we can also think when we're talking about wave function squared, what we're really talking about is the probability density, right, the probability in some volume.

波函数平方,的时候，我们说的，是概率密度，对吧,是在某些体积内的概率，但我们有办法。

麻省理工公开课 - 化学原理课程节选

And when we take the wave function and square it, that's going to be equal to the probability density of finding an electron at some point in your atom.

当我们把波函数平方时，就等于在某处,找到一个电子的概率密度。

麻省理工公开课 - 化学原理课程节选