模拟对白用英语可以说是 "simulated dialogue" 或 "simulated conversation."
这两个词都来自于英文 "simulate," 这个词本身有 "模拟" 的意思。
例句：
The teacher asked the students to practice their conversation skills by engaging in a simulated dialogue. (教师让学生通过模拟对话来练习他们的对话技巧。)
The AI program was able to generate reapstic simulated conversations between two people. (这个 AI 程序能够生成两个人之间的逼真模拟对话。)