jǐng / bào / xiǎng / le / bàn / tiān / zuì / hòu / fā / xiàn / zhǐ / shì / xū / jīng / yī / chǎng

警报响了半天，最后发现只是虚惊一场。

The alarm went off for a long time, but it turned out to be a false alarm.