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

他们在通风管上叮当作响，在露台屋顶上砰砰作响。

Paul studied the yellow cloud belching from the crawler's pipe vents, looked out over the desert at the approaching worm track.

保罗研究着从爬行者的管道通风口喷出的黄色云朵，眺望着沙漠上逐渐逼近的蠕虫踪迹。