当留学生在吃饭时与同伴讨论川菜，他们可能会用到以下英语对话：

周清: How do you like the boiled beef in chili soup？

山姆: I love the tender beef, but it's far too spicy. I can't feel my tongue.

周清: No wonder you only had a little bit.

山姆: So Sichuan food in China is different from that in the US, right？

周清: Right. The overseas Chinese food isn't as authentic as real Chinese food.

这些对话展示了如何用英语表达对川菜的看法，包括对辣度的感受、对食物的评价，以及对比中美两国川菜的差异。通过这样的交流，留学生不仅能分享自己的用餐体验，还能增进对川菜文化的理解。