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

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

“随我来，”那个男人说，“翻过那座小山，有个老地窖，几年前是一个人的农场，四周长满了紫丁香。”

"Come with me," the man said. "Over that hill is an old cellar hole, from somebody's farm of years ago, and there are lilacs all round it."

youdao