Definition: to cause something to begin or happen, especially a loud noise or a lot of activity Level: C2
火花引发了一场巨大的爆炸。
The spark ___set ___off a massive explosion.
公告引发了一波骚乱。
The announcement ___set ___off a wave of riots.
他会通过点燃一些火柴来触发烟雾报警器。
He would ___set ___off the smoke alarm by lighting some of his matches.
