你可以用 "不像他哥哥" 这个短语来描述一个人的特征或行为与其兄弟不同。这个短语的来源可能来自于普通话语言中的 "不像" 这个词，它的意思是 "不一样" 或 "不同"。
下面是一些例句：
他的哥哥很高，但他不像他哥哥那么高。(His brother is tall, but he isn't as tall as his brother.)
她的哥哥很有才华，但她不像他哥哥那么有才华。(Her brother is talented, but she isn't as talented as her brother.)
他的哥哥很勤奋，但他不像他哥哥那么勤奋。(His brother is hardworking, but he isn't as hardworking as his brother.)
下面是一些例句：
他的哥哥很高，但他不像他哥哥那么高。(His brother is tall, but he isn't as tall as his brother.)
她的哥哥很有才华，但她不像他哥哥那么有才华。(Her brother is talented, but she isn't as talented as her brother.)
他的哥哥很勤奋，但他不像他哥哥那么勤奋。(His brother is hardworking, but he isn't as hardworking as his brother.)