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问题: now that? 急!!

some people have been saying for a few years now that manned space exploration is too expensive.Indeed,many scientist have said that if wwe want to know more about distant galaxies and more about the universe as a whole,we should improve our radio telescopes.
翻译此文。另外,第一句是什么结构?now ,that是宾语从句?谢谢

解答:

这个句子应该这样划分:
some people have being saying(for a few years now)that ……
所以这里的that引导后面的宾语从句,而now是为了强调此句为一现在完成进行时态。说明一直以来存在的状态。

翻译:一直以来,总有一些人觉得载人航天的探索成本太高。实际上许多科学家早就提出过,如果我们想知道一些远方星系更多一点,以及想更好地从整体上了解这个宇宙,我们就应该改进我们的射电望远镜设备。

仅供参考哦~o(∩_∩)o...