people didn't know much about the sun or the

people didn't know much about the sun or the
people didn't know much about the sun or the

people didn't know much about the sun or the
人们对太阳系或是对地球都知之甚少.

People didn't know much about the sun or the earth.
句意：人们过去对太阳和地球了解得并不多。
“过去”一词是从didn't体现出来的。而否定句中用or来代替and，不用and作并列连接。但翻译时，仍然把or译为“和”，而不是译为“或”。

人们过去对太阳和地球了解的不多