Some of this work's been done at Yale in Karen Wynn's lab, where they look at babies' understanding of addition and subtraction.

这个研究的一些部分是在耶鲁的,凯伦·韦恩实验室进行的,他们在那里观察婴儿对加减法的理解

耶鲁公开课 - 心理学导论课程节选

Most of these are probably self explanatory, addition, subtraction, multiplication, division, and anyone?

其中很多都不需要加以说明的，像加号，减号，乘号，除号和？

哈佛公开课 - 计算机科学课程节选