And you can use mnemonics to try to keep these straight I see the T as sort of a plus sign.

你可以使用记忆术来记清它们,我将T看成是加号。

麻省理工公开课 - 固态化学导论课程节选

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

No, here both are plus, but this one has a minus.

不对,这里都是加号,但这有个负号

耶鲁公开课 - 基础物理课程节选

So I can concatenate techs plus ivys and assign that result to univs, and then when I print it you'll notice I just get a list of five strings.

和ivys数组用加号串联运算,并把结果赋值给univs数组，接下来我显示下univs的结果,你注意到我得到了一个。

麻省理工公开课 - 计算机科学及编程导论课程节选