why waste time learning when ignorance is instantaneous 什么意思?

如题.
Why waste time learning when ignorance is instantaneous ?
我在一本翻译书（这名话出自《the c++ programming language》）上找到的翻译是：“要是即刻就忘，何须费时去学？”你们感觉翻译的怎么样？我觉得似乎有点……

waste time和a waste of time的区别 miss one time waste whole life Why does time fiy? Let's not waste our time.这里waste可不可以作动词，前面不要be How do you deal with people who waste time? be taken a waste of time 是固定用法吗？ Don't waste your time on a man, who isn't willing to waste their time on you. Don‘t waste your time on a man/woman, who isn‘t willing to waste their time on you. The more time you waste ，the easier it is to go on wasting time Time ____ will never come back again.(A.waste B.wasted C.wasting D.wastes)