translation.en: And the reason he's waited three days is because he knows that on the fourth day or the fifth day, those larvae will hatch and he'll have a huge fly problem.
translation.zh: 而他之所以要等三天 则是因为他知道在第四天或者第五天，这些幼体将要孵化成虫， 到时候麻烦就大了。