You use exceptional to describe someone or something that has a particular quality, usually a good quality, to an unusually high degree.
children with exceptional ability.
才能非凡的孩子们。
Exceptional situations and incidents are unusual and only likely to happen infrequently.
A review panel concluded that there were no exceptional circumstances that would warrant a lesser penalty for him.
一个评估小组作出结论:没有什么例外情况可使他获得从轻惩罚。