厨房一旦有苍蝇滋生,就说明垃圾处理流程出了问题。Chúfáng yídàn yǒu cāngying zīshēng, jiù shuōmíng lājī chǔlǐ liúchéng chū le wèntí.Once flies start breeding in the kitchen, it shows that there is a problem with the rubbish-disposal process.
桌上的西瓜招来了好几只苍蝇。Zhuō shang de xīguā zhāolái le hǎo jǐ zhī cāngying.The watermelon on the table attracted quite a few flies.
夏天到了,我们得买个苍蝇拍。Xiàtiān dào le, wǒmen děi mǎi ge cāngyingpāi.Summer is here, so we need to buy a fly swatter.