能证明自己的存在和能力。

To justify their existence and capabilities.

youdao

据推测，抗体可能是以不能被现有方法发现的形式存在，也可能是以造成红细胞破坏的方式证明自己的存在。

It was postulated that forms of antibodies might exist that could not be demonstrated by available methods and that manifested themselves only by causing destruction of red blood cells.

youdao