迄今，各类化学教学书刊所介绍的纸折空间构型的模型，一般均需利用作图工具，事先绘制出各平面图形，经剪接、粘贴而成．这种传统的纸折法比较费时．本文介绍一种正四面体（如CH。、NHZ、SO才等）的简易折送法，它只需信封和剪刀，便可在一分钟内迅速完成．故适于学生在课堂上 So far, the paper folding space model introduced by various types of chemistry teaching books and magazines generally requires the use of drawing tools to draw out the plane graphics in advance, and then cuts and pastes them. This traditional paper folding method is more time consuming. This article describes a simple folding method for a regular tetrahedron (such as CH, NHZ, SO, etc.) that requires only envelopes and scissors to be completed quickly in one minute. It is suitable for students in the classroom