I really just toughed it out, and that's when I thought of this idea.

我真的只是坚持了下来，就在那时我想到了这个想法。

So I really just toughed it out in my flip-flops, and that's when I thought of this idea.

所以我真的只是穿着人字拖坚持了下来，就在那时我想到了这个想法。