act of brutality的用法和样例：
- Each act of brutality, though perhaps effective in the short run, erodes the credibility of a regime that prides itself on being close to God.
- This dreadful murder is surely the act of a madman.
- Don't complain of anybody. This is an act of God.
- They accused the police of brutality.
- He was caught in the very act of espionage.