It's only when you've written such things that you really understand them,with insight into when they are and aren't use

问题描述:

It's only when you've written such things that you really understand them,with insight into when they are and aren't useful,what the efficiency issues are,and so forth.

只有当你写下这些东西你才能了解它们是否有用,有效的要点是什么.