spend：指花费时间和金钱。只能用人做主语，有被动语态。常用结构：某人+spend（s）+时间/金钱+on sth./(in) doing sth.

pay：指支付金钱和感情的回报。只能用人做主语。常用结构：某人+pay（s）+金钱+for sth.

相关介绍

I spent what little time I had with my family.

我仅有的一点儿时间都和家人在一起度过了。

The money could be better spent on more urgent cases.

这笔钱用于较紧迫的事情也许会好些。

They pay slightly more than the going rate.

他们支付的酬金略高于现行标准。