【原文】At the start of 2019 came more bad news, as a lengthy partial federal-government shutdown depressed both output and consumer sentiment. The economy had been expected to cool a little anyway, as the impetus from the Trump administration's fiscal stimulus faded...
The importance of the fact that English sentences can be constructed to be as long as might be necessary to express some meaning is that it makes the sentences of English impossible to encapsulate in a list.请问这句话应该如何补全？
As is known to everyone, the moon travels round the earth once every moth.
实在搞不明白，as既然是代替逗号后面的内容，那么他不就跟 It is know to everyone that ...完全一样了吗？为什么还称他是非限制定语？