translation.en: And biological pest control, by the way, or these good bugs that we are talking about, they've existed in the world for thousands and thousands of years, for a long, long time.
translation.zh: 这种生物抑制害虫法， 或是我们所谈的这种益虫， 它们已经存在这世上好几千年了， 已经很久很久了。