1·It took him a long time to unlearn what he learned in his childhood.
经过很长时间他才忘却了儿童时代所学到的知识。
2·In a way, we need to unlearn some of the things we've taught ourselves so that we end up with a tabula rasa (that's lawyer-speak for "blank SLATE").
在某种程度上，我们需要忘却一些自学到的东西，对于葡萄酒要成为一块白板。
3·Also consider that you will have to "unlearn" Smart Mode flying once you're comfortable enough to make the switch to normal flying.
同时认为，你将不得不“忘却”智能模式飞行，一旦你舒适，足以使开关正常飞行。