He felt that his brother had behaved disgracefully.

他觉得他兄弟表现得丟人现眼。

《柯林斯英汉双解大词典》

When one student behaves disgracefully, it reflects badly on the whole class, even the whole school.

一个学生的不光彩行为会给整个班级、甚至整个学校带来很坏的影响。

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He's a big child. He behaves disgracefully.

他是个大孩子，他的举动太丢人。

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Republican Congressman Trent Franks said, "It is disgracefully ironic that today's announcement comes only a week after announcing our abandonment of the European missile defense site which could have protected the homeland of the United States against Iranian long-range missiles."

VOA: standard.2009.09.25

As recently as December 2012, Conservative MP Philip Hollobone called it a "disgracefully inadequate estimate".

BBC: UK Politics

But the conflicts of interest inherent to investment banks became disgracefully sharper during the long 1990s bull market.

ECONOMIST: Why investors should always be suspicious of advisers

In 2008, the IOC disgracefully agreed to let China block access to Internet sites in the Beijing games.

CNN: Olympics, mark dark day in Munich