这种做法类似于房子烧毁后再安装洒水装置。
That is akin to installing sprinklers after the house has burned down.
你应该先从照明工具包入手，然后再安装安全设备。
You could begin with a lighting starter kit and add on security devices later.
所有的电脑应用以及资料处理都可以在网页上完成，用户不必再安装其它的程序。
Also, all the computer's applications and data are on the web, and users cannot install programs themselves.
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