在英语中，准确表达“薯片不是饼干”可以通过以下几种方式：
- “Potato chips are not cookies.”
- “Potato chips do not qualify as cookies.”
- “Potato chips are not a type of cookie.”
- “The term ‘potato chip’ does not encompass the category of cookies.”
- “Potato chips are distinct from cookies.”
- “It is incorrect to refer to potato chips as cookies.”
- “Potato chips and cookies are two different kinds of snacks.”
这些表达都清楚地传达了薯片和饼干是两种不同类型的食品的信息。