还有未分配利润是指将盈余公积减掉后剩下的净利润吗？

概念性的东西书上都有，我就不打了，讲些自己的理解吧。

资本公积主要包括两方面：一、资本溢价，比如一家企业注册资本100万，A占50%，但是他投入了60万，多的10万就计入资本公积——资本溢价；
二、其他资本公积，主要是指直接计入所有者权益的利得和损失。比如权益法下被投资单位除净损益之外的所有者权益变动，或者是可供出售金融资产公允价值变动，自用房地产转为以公允价值计量的投资性房地产

盈余公积是从净利润中提取的积累资金，主要是为了不断积累资本，为了以后壮大打基础。

未分配利润是扣除盈余公积、所得税、现金股利等之后最终剩下的净收益，一般本年未分配利润的变化额就是本年实现的净利润

Stockholders' equity consists of contributed capital and retained earnings.
par value + paid in capital = contributed capital
retained earnings is accumulated net income less dividend payments.

The main difference between contributed capital and retained earnings is that contributed capital is obtained directly from shareholders' investment; while retained earnings comes indirectly from shareholders' investment.