分析一下这个句子的结构、语法.

分析一下这个句子的结构、语法.
Scientists have been baffled as weeksand sometimes months have gone by without a single sunspot,in what is thought to be the deepest solar minimum for almost 100 years.

Scientists have been baffled / as weeks and sometimes months have gone by
几个星期甚至几个月过去了,科学家们大惑不解
weeks and sometimes months have gone by/ without a single sunspot,
几个星期甚至几个月过去了,没出现哪怕一个太阳黑点
(如：He had gone two days without online 他两天没上网啦)
a single sunspot 太阳黑点/ in what is thought to be 被认为里面有/ the deepest solar minimum / for almost 100 years.

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