I cannot forgive myself for not seeing my mother when she was sick in bed.
母亲病的时候我没能去看她,为这件事我永远不能原谅我自己。
Like a scientist bent on making a discovery, he must cherish the hope that one day he will be amply rewarded.
他必须像一个专心致志进行探索的科学家那样抱有这样的希望,即终有一天,他的努力会取得丰硕的成果。