They are gaps in the sun's magnetic field which make a hole through the star's super-hot outer atmosphere — the corona — allowing gas to escape, according to a NASA description.
根据美国国家航空航天局的描述，他们是太阳磁场的缺口，太阳磁场制造了一个穿透这颗恒星外层大气的空洞—日冕，允许气体逃脱。
Using a 1/16" drill bit, drill a hole in the middle of the cross section tube above. This will allow gas to escape during welding."
使用1 / 16“钻头，钻一个孔在上面管中间的横截面。这将使天然气逃脱焊接过程。
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