•Acquit (verb) - To decide officially in a law court that someone is not guilty of a particular crime. （宣判…无罪）

Examples:

1.Mr Ling was acquitted of disorderly behaviour by magistrates.　　

2.Five months ago he was acquitted on a shoplifting charge.

•On the grounds that (idiom) - For the reason that; because.（以…为理由，理由是…）

Examples:

1.Many critics have objected to the proposal on the grounds that it would be too costly.　　

2.He refused to answer on the grounds that the question violated his rights to privacy.

•Preside over sth (phrasal verb) - To be in a position of authority at a time when important things are happening.（掌管；主持（尤指正式会议或审判））

Examples:

1.He was appointed to preside over the murder trial.　　

2.I would preside over the meeting in a just manner.

•Put/set someone's mind at rest (idiom) - To stop someone from worrying about something. （让某人放心、安心）

Examples:

1.It may be advisable to have a blood test to put your mind at rest.　　

2.I wish I could put their minds at rest.

•Raise (some/a few) eyebrows (idiom) - If something that someone does raises eyebrows, it surprises, shocks, or offends people.（令人震惊，令人侧目）

Examples:　　

1.The size of his salary has certainly raised eyebrows.　　

2.His outspoken comments raised a few eyebrows at the meeting.