and和make之间省略了什么？

问题描述

They are like the birds that sing to us all winter long,and make that season of ice and snow more endurable

老师答疑

刘老师：

They are like the birds that sing to us all winter long, and make that season of ice and snow more endurable.

这是个并列句。显而易见，在and之后承前省略了重复的主语they。