He was summoned to testify before a grand jury.

他被传唤出庭在大陪审团前作证。

《牛津词典》

She even traveled to Washington to testify before Congress.

她甚至远赴华盛顿，在国会作证。

youdao

Thank you for this opportunity to testify before you this morning.

谢谢你们给我机会参加今天的听证会。

youdao

Two weeks after the Columbine massacre, Ludlow Colorado I got called before the U.S. Senate Commerce Committee to testify on the relationship of youth culture and violent entertainment.

科罗拉多可伦拜高中枪杀案，事发两周后,美国参议院商务委员会给我打电话,让我参加一场听证会,主题是青年文化和暴力性娱乐的关系。

麻省理工公开课 - 媒体、教育、市场课程节选

He is frequently invited to testify before Congress and in state legislatures regarding climate science.

FORBES: The Meltdown Of Global Warmists Reveals Their True Priorities

But with no offer of immunity from federal prosecutors, Huang has refused to testify before Thompson.

CNN: Campaign Finance: The Show Begins

Hastert is far from the first House speaker to testify before the ethics committee.

NPR: Hastert Speaks to Ethics Panel on Foley Scandal