天性如此;生下就这样
be / be born / be made that way
to behave or do things in a particular manner because it is part of your character
It's not his fault he's so pompous — he was born that way.他如此自命不凡并不是他的错,他天生就是这种性格。
释义来自《牛津高阶英汉双解词典》第 9 版