Lěng / bù / fáng / xià / qǐ / le / dà / yǔ / wǒ / men / zhǐ / hǎo / gǎn / kuài / zhǎo / dì / fang / bì / yǔ

冷不防下起了大雨，我们只好赶快找地方避雨。

It suddenly started raining heavily, so we had to quickly find shelter.