wū yún / gāng / zhē zhù / shān dǐng / qǐng kè jiān / dà yǔ / biàn / qīng pén ér xià

乌云刚遮住山顶，顷刻间，大雨便倾盆而下。

As soon as dark clouds covered the mountaintop, heavy rain began pouring down within an instant.