英语翻译A commonly used rainwater conveyance system is comprised

英语翻译A commonly used rainwater conveyance system is comprised of gutters with downspouts and/or rainchains.Gutters and downspouts direct rain from rooftop catchment surfaces to cisterns or storage tanks.Rainchains are lengths of chain that hang from gutters and direct rainwater down their lengths,thereby minimizing splash.In the rainwater harvesting process,they may be used when water is being collected for below-grade storage or directed to a landscaped area.