tīng / dào / zhè / ge / yì / wài / de / hǎo / xiāo / xi / tā / lì / kè / liě / kāi / zuǐ / xiào / le / qǐ / lái

听到这个意外的好消息，她立刻咧开嘴笑了起来。

When she heard the unexpectedly good news, she immediately broke into a wide grin.