Look, never mind mountains. Your mother wants to know if you're eating properly.
先不管那些山。你妈妈想知道你是不是有好好吃饭？

Never mind…
不要管… 不要考虑…

Forget it
不必在意，不要管

A: I've got to go back for my sunglasses.
我得回去取我的太阳眼镜。
B: Forget the sunglasses. We're gonna be late.
不要管眼镜了。我们要迟到了。

Forget the costs for one second and listen to the potential of this investment.
暂时不要管成本，先听下这个投资的潜力。

Don't worry about
不用担心…

Don't worry about the car. I'm just relieved to hear that you are ok.
不要担心那辆车。听到你没事儿我就放心了。

Don't worry about the details. Let me take care of that.
不要担心那些细节。我会搞定的。

Don't worry about what's coming. Focus on now.
不要管未来会怎样，就关注现在。

It doesn't matter
没关系，不重要

The marketing doesn't matter. What matters is good content.
营销不重要。重要的是好的内容。

A: I need to finish typing the title page.
我得写完标题页。
B: That doesn't matter. You need to type up a summary of the paper first.
那不重要。你得先写论文的总结。