I don't understand what you said
我不懂───I didn't get it.;说───say
At the time, I didn't get it. I wanted to do everything right.───那时我没有理解这话，只想把一切都做好。
I didn't get it because it cost too much.───因为那东西太昂贵我没买。
Personally, I didn't get it.───以我来说，我不是很理解。
"Well, no, I didn't get it from a comic book, but I didn't come up with it on my own, either, " I confessed.───“嗯，不是，我不是从漫画书里看到的，但我也不是自己想出来的。”我供认道。
I told him I would if he would. And then I didn't get it.───我跟他说你可以我就可以之后我就没选上了
I didn't get it when I was a kid and I've heard that you can even die if you get it as an adult!───我小时候没得水痘，我听说即使是大人得了水痘也可能死掉。
It was a prize-winning joke, but I didn't get it.
I don't think it's such a great job - and that's not just sour grapes because I didn't get it.
I didn't get it because it cost too much.
Now, I didn't get it because I was the greatest thing since sliced bread.