yǔshuǐ / luòzài / línshí / dāqǐ / de / péngdǐng / shàng / bìbìpāpā / de / qiāozhe / tiěpí雨水落在临时搭起的棚顶上,哔哔啪啪地敲着铁皮。Rain fell on the roof of the temporary shelter, making a rapid flapping sound as it struck the sheet metal.