translation.en: And so this is what you do: you have a free-style artist come in and memorize a rap that you write for them, that they've never heard before, and then you have them free-style.
translation.zh: 这是你要做的：你请一个自由说唱的艺术家来 记住你为他们写好的说唱词， 他们以前从来没听说过这种说唱词， 然后你让他们自由发挥。