For a sunspot to form on the solar surface, the magnetic field needs to attain a certain strength to push the surface plasma aside, exposing the solar interior as a cool spot — a sunspot.
在太阳表面，磁场强度必须强到能推开表面的等离子体，将温度较低太阳内部的暴露在外，形成一个太阳黑子。
It was a cool spot, staid but cheerful, a wonderful place for echoes, and a very harbour from the raging streets.
那地方清凉、安谧、幽静，今人陶醉，是个听回声的奇妙地方，是扰攘的市廛之外的一个避嚣良港。
It was a cool spot, staid but cheerful, a wonderful place for echoes, and a very harbour from the raging streets.
那地方清凉、安谧、幽静，今人陶醉，是个听回声的奇妙地方，是扰攘的市廛之外的一个避嚣良港。
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