When you spring for something, you pay for someone else.

当你为某物买单（spring for），你替别人支付费用。

I got something from a fast food joint along the way. I should have sprung for something a little better, though. I'm starting to suffer for my choice.

我在路边的快餐店买了些吃的。但我应该多花点钱买好点的东西。我开始因为这个选择受罪了。

" To spring for (something)" means to pay for something; it's an informal way of saying to buy or to pay for – " to spring for (something)" .

“to spring for (something)”表示为某事付出；这是购买或支付的一种非正式说法 – “为（某物）而努力”。