The bulk of the Ruby class Calc USES Ruby's metaprogramming features to define functions at run time for all the digit keys and for the math operation keys.

大多数Ruby类Calc使用Ruby的元编程功能，在运行时为所有数字键和数学操作键定义功能。

youdao

So if the operation of these facilities is delayed by five days and the consultants cannot work on site -- well, you can do the math.

因此，如果这些设备的运行延迟了五天，并且咨询师不能在现场工作--那么，你可以计算一下。

youdao

According to the Organisation for Economic Co-operation and Development (OECD), our 15-year-olds rank 17th in the world in science and 25th in math.

根据经合组织的数据，我国十五岁年轻人的科技知识在世界排名第17，数学知识排名第25。

youdao

3 So here what I'm doing is 17 divided by 13, but because of this parenthetical, , -- because of that parenthetical -- that has nothing to do with math; -- this is a programming language thing -- that is a casting operation.

所以这里我要做的是用17除以，但因为这样的题外话，因为那样的题外话-,还是没有做完这个数学题;,这是一个编程语言的东西-,那是一个计算操作。

哈佛公开课 - 计算机科学课程节选