If a report or investigation absolves someone from blame or responsibility, it formally states that he or she is not guilty or is not to blame.
①A police investigation yesterday absolved the police of all blame in the incident.
②The inquiry which absolved the soldiers.
Matt Haig的新书 The Midnight Library 也出现了这个表达：
pull the trigger
If something pulls the triggers in an event or situation, it causes it to begin to happen or exist.
①The current recession was triggered by a slump in consumer spending.
②Even a problem as simple as a bad back often has an underlying triggering factor.
《卫报》一篇题为 Stuck in the middle with the love 的文章也提到了这个表达：