He has always lived in the shadow of his brother.

他一直生活在他哥哥的阴影之下。

《柯林斯英汉双解大词典》

As any younger brother will tell you, having a big brother involves a lot of walking in someone else's shadow, especially when you have a brother who is a typical example of "cool".

所有的弟弟都会这么说，有个哥哥就意味着要一直活在别人的阴影里，尤其是当你有一个典型的“酷”老哥的时候。

youdao

But in some ways raul Castro must still govern in the shadow of his older, and ailing, brother, Fidel.

尽管菲德尔·卡斯特罗年老病重，但是从一定程度上讲，劳尔·卡斯特罗的统治仍将受其哥哥的影响。

youdao

With the start of the "arduous march" in the mid-1990s, even the shadow of my brother was impossible to catch at home.

NPR: Literature and Lullabies from the 'Axis of Evil'