问题: Why are people so keen on buying iPhones even though they haven't changed much from one to the next?
解析

1. Discuss the reasons why people continue to purchase iPhones despite minimal changes between models. Consider aspects like brand loyalty, perceived status, ecosystem, and marketing. 2. You can also mention personal observations or general consumer behavior trends related to technology and brand preference.

1. 讨论人们继续购买iPhone的原因，尽管各个型号之间变化不大。考虑品牌忠诚度、 perceived status、生态系统和营销等方面。 2. 您还可以提及与技术和品牌偏好相关的个人观察或一般消费者行为趋势。

同义词替换
不要直接重复考官的问题，试试这些同义词：
  1. keen on→enthusiastic about; fond of; interested in
    热衷于; 喜欢; 对...感兴趣
  2. buying→purchasing; acquiring
    购买; 获得
  3. haven't changed much→remain similar; show little variation
    保持相似；变化很小
  4. from one to the next→from one model to another; from one version to the next
    从一个模型到另一个模型；从一个版本到下一个版本