求翻译：之所以学习时昏昏沉沉，主要是你把学习看成了负担，看成了赌注。所以一看书就想到许多个万一，心理压力就随之而来，脑子开始混乱，哪还能学的下去。是什么意思？

Learning is heavily, mainly you see learning as a burden, as the stakes. So reading a thought of many a case, psychological pressure ensued, his mind began confusion, which can go on.