In coin.
以硬币形式
In a similar manner; in kind
以同种类：以同样的方式；同类的
repaid the offense in specie.以牙还牙
repaid the offense in specie.
以牙还牙
&I{Law} In the same kind or shape; as specified.
&I{【法律】} 同类或同形的；按规定的