Such "chorus waves" form in a region of space that lies just above the plasmasphere, a section of Earth's protective magnetic bubble filled with plasma, or electrically charged gas.
此类在宇宙某一地区内形成的“哨声波”位于等离子层的正上方，这是地球的保护性磁泡，充满了等离子，或者说是荷电气体。
And in 2005 astronomers found that sound waves rippling through the primordial plasma 400,000 years after the Big Bang left imprints in modern nearby galaxies.
在2005年，天文学家发现声波在宇宙大爆炸留给现代附近星系印记之后的40万年仍在原生等离子体中荡漾。
The fluid model was used to study the nonlinear dust drift waves in dusty plasma.
采用流体模型，研究尘埃等离子体中的非线性尘埃—漂移波。
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