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sudo apt-get install mit-scheme下列的软件包有不能满足的依赖关系：mit-scheme: 依赖: libltdl3 (>= 1.5.2-2) 但却无法安装它到这个网站下载一个libtdl3的deb，安装之，然后再装mit-scheme。mit-scheme是SICP（计算机程序构造与解释）使用的教学语言，现在也是GNU官方维护的一个软件。可惜的是，GN

how to use the Edwin1,if there is no META or EDIT key,Alt is that key.2,to end the session, C-x C-c.3,C-v ,to the next screem4,C-g will quit what it was doing and allow you to enter it in agai