"They are different" 是表示 "他们不一样" 的常用表达方式。
来源：这是一个简单的结构，没有特定的词源。
英文例句：
"The two paintings are different in style." (两幅画风格不同)
"He and his brother are different in many ways." (他和他的兄弟在很多方面都不同)
"The two products are different in terms of their features." (这两个产品在特点上是不同的)