模式空间(pattern space)和保持空间(hold space)">模式空间(pattern space)和保持空间(hold space) 模式空间(pattern space)和保持空间(hold space) https://blog.51cto.com/bluebox/1697917https://www.cnblogs.com/51linux/archive/2011/09/24/2189420.htmlhttps://blog.csdn.net/zr1076311296/article/details/51277915https://www.cnblogs.com/liubi/p/8998686.html
