问题是一环套一环。
所以他才用了这么多玄而又玄的术语，还有这么多一环套一环的从句。
That was why he deployed so much arcane terminology, so many loop-de-looping clauses.
上图的插图中，在大量的背景恒星前，部分的尘埃环套以橘色显示。
Pictured above in the inset, part of the dust ring appears as false-color orange in front of numerous background stars.
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