it's your business 这是你的事
And you think it's your business?
你觉得这是你该管的事？
If you want to indulge this fantasy, it's your business.
你要继续幻想的话，那是你的事。

out of the blue 出其不意，出乎意料;
Such anxious analysis does not come out of the blue.
如此令人担忧的分析结果不是意外得到的。
Her husband appeared out of the blue.
她的丈夫出乎意料地来了。

figure out 计算出，解决; 弄明白; 合计
If I figure out how that works I'll post an update.
笔者弄清真相后将会发布最新发现。
Her mission was to figure out what where she could make an impact.
她的使命是找出自己能够施加影响的领域。