be out和go off的意思不同。

go off有表示爆炸的意思，例句:But when they start to run back up the shore, a series of explosions go off under their feet, scattering blood and body parts everywhere.但等他们跑回沙滩时，一系列爆炸在他们的脚下接连发生，血迹和身体残骸散落得到处都是。be out的意思是不在家。例句:She happened to be out when we called.我们打电话时她刚巧不在家。