//comment1,‘ctrl+v‘ to VISUAL BLOCK mode.2,‘j‘ or ‘k‘ to select/deselect lines.3,‘I‘ to INSERT mode.4,‘#‘ and ‘ESC‘.
//uncommentstep ‘1‘,‘2‘ are the same.‘d‘.
linux(vi)多行注释和取消注释.
原文：http://www.cnblogs.com/listened/p/3929358.html
