They plink on the pipe and plunk on the patio roof.

它们叮叮当当地敲击着排气管，砰然掉落在露台顶上。

The rhythm accelerates; plink follows plunk faster and faster until the sound is a roll of drums and the individual drops become an army marching over fields and rooftops.

雨加快了节奏，叮当声、乒乓声，一阵紧以一阵，最后连成一片绵密的鼓点，点点雨滴也汇成千军万马，扑向田野、屋顶。