dd

that指代前文的可数名词单数和不可数名词，those指代前文的可数名词复数。

Living in space is every would-beastronaut’s dream. My six-month stay on a space station has come to an end, and it has been a challenging but magical adventure. I bet you’d love to know what daily life is like up in space and how it differs from that on the Earth.
that=the life

同意二楼 这不是定从喔 （定从的话关系代词前面一般必须是个名词的，这前面是differ from 不是名词）
这个属于that用于指代上文出现过的名词的用法