脚手架价钱:why is a math book sad

来源：百度文库 编辑：中科新闻网 时间：2024/05/13 06:07:18

It has many problems.

直译：为什么那本数学书很伤心
口语：你为什么觉得数学书很无趣

长见识了

为什么数学书很无聊?

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