Question

it's not as if they aren't ready for the real world because they are.

对句型it's not as if...not...because..准确翻译。

Answer 1

这并不是说（这并不意味着）……不可以（不能够、不行），事实上（实际上）……
it's not as if they aren't ready for the real world because they are后面省略了ready for the real world
it代表只有六到八个月龄的Marmots
it's not as if they aren't ready for the real world because they are ready for the real world
可以翻译为
虽然这些土拨鼠后代只有六到八个月龄，但这并不意味着它们没有准备好独立面对现实世界，实际上它们已经准备好了（独立面对现实世界）
或者意译为
它们就是这样，如果面对现实世界它们没做好准备的话，是不会那样做的。