act of espionage的用法和样例：
- He was caught in the very act of espionage.
- He was caught in the very act of espionage .
- This dreadful murder is surely the act of a madman.
- Whoever commits any of the following acts of espionage and endangers national security is to be sentenced to not less than 10 years of fixed-term imprisonment or life imprisonment.
- Don't complain of anybody. This is an act of God.
- She worked over the first act of the play.