要将这个公式转换为一个表达式，你需要使用变量来记录半径及周长。

To translate this formula into an expression, you would use variables to record the radius and circumference.

youdao

下一步，您需要熟悉变量(纵列)和记录(横行)。

Next, you need to be comfortable with variables (columns) and records (rows).

youdao

要将这个公式转换为表达式，你需要使用变量来记录半径及周长。

To translate this formula into a expression, you would use variables to record the radius and circumference.

youdao

I've got some internal variables I have to store, what kinds of things do I have to keep track of?

计算的时候需要占用多少内存,我需要存储一些内部变量,我需要记录哪些东西呢？

麻省理工公开课 - 计算机科学及编程导论课程节选