adv.正直地,正当地;
例句:
What share of market is rightfully ours?
什么市场份额,是正确的 呢 ?
I am just rightfully using my right of vote.
我只是在合理的使用我的选举权.
Multi-lingualism should rightfully be an unique advantage to us.
多语,实在应该是一种独特的优势.