PHP preg_replace() 正则替换，与Javascript 正则替换不同，PHP preg_replace() 默认就是替换所有符号匹配条件的元素。preg_replace (正则表达式, 替换成, 字符串, 最大替换次数【默认-1，无数次】, 替换次数)
查看linux机器是32位还是64位的方法：如果显示 64-bit 则为64位；file /sbin/init
（一） 编译好的文件（二）通过源码编译 （三）apt-get,Linux下Nodejs安装（完整详细）
jQuery的Autocomplete（自动完成、自动填充）插件有不少，但比较下来我感觉，还是bassistance.de的JQuery Autocomplete plugin比较强大,formatItem、formatMatch、formatResult是自定提示信息的关键。
在ＰＨＰ的数组中，允许不同的元素可以取同一个值，但不允许同一个键名被不同的元素使用，php array_flip() 删除数组重复元素
I. Read aloud the following dialogue taken from the text until you can say it from memory. "Sandy, why don't you sit down and eat your breakfast? It isn't healthy to eat standing up." "I know. Mom, but I'm already late for school. I don't have time to sit down and eat." "Did you finish your homework, dear?" "Yes." "Do you have your instrument?" "Uh-huh." "And your lunch?" "Yah." "Did you brush your teeth?" "Mom, I haven't finished eating breakfast yet. I'll brush my teeth when I'm done." "You should brush your teeth when you wake up and then brush them again after breakfast. Sandy, why are you wearing that old T-shirt? It's disgusting. I know you have some nice blouses in your closet." "Mom, please stop." "Stop what, dear?" "Stop bugging me."
