So the weather satellites are a great help to the meteorolog

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1.= So the weather satellites are greatly helpful to the meteorologists.
2.这是一个单独的句子么?句首的that有问题啊!
是一般疑问句么?则答案为：May the weather on the ground soon change?
如果是改同义句,则常规变化如下：(That) maybe/perhaps the weather on the ground will soon change.
注：/ 表示可以任意选用其一.
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