From those density fluctuations galaxies eventually formed.

星系最终就是在这些密度涨落中形成的。

youdao

Making use of the stochastic model, we have studied the low-hybrid wave scattering by the density fluctuations in the edge-regions of Tokamak plasmas.

本文采用随机模型，讨论等离子体边界层密度涨落对低混杂波的散射。

youdao

But it is possible to detect minute deviations in this signal, and these fluctuations - seen as mottling in the map - are understood to reflect the differences in the density of matter when the light parted company and set out on its journey all those years ago.

BBC: Planck satellite: Maps detail Universe's ancient light