问题描述: 请帮忙翻译成英文" 我不清楚你所指的PI是什么,请给我具体的格式, 1个回答 分类:英语 2014-11-22 问题解答: 我来补答 I don't understand what the meaning of PI is.Please explain the detailed format to me.Thank you. 展开全文阅读