"trial/error"是什么意思?

"trial/error"是什么意思? trial and error is the source of our knowledge是什么意思? trial balance是什么意思 post-closing trial balance是什么意思 launch the trial version是什么意思 My trial license has expired是什么意思? 英语翻译What those early craftmen had found by trial and error w Life is full of trial and error.One failure doesn't mean you how could you make sure of 9% by the trial and error method? i believe i can.just like someone else.by trial and error... error from server是什么意思 error reading socket是什么意思,