It's painted on with something called indelible ink, meaning it can't be removed easily.

它是用一种叫做不褪色墨水的东西涂上去的，这意味着它不容易被擦掉。

Penny's hooking up with her jerk of an exboyfriend and I have indelible ink on my forehead!

佩妮和混蛋前男友勾搭上了，我脑门还写着大大的墨水字！

They look for young children, making sure first to check their pinkie fingers, where an indelible ink is placed once a child is immunized.

他们寻找年幼的孩子，确保首先检查他们的小指，一旦孩子接种了疫苗，就会在小指上涂上不可磨灭的墨水。

Yeah but, it is something that you will have forever! They use indelible ink that can only be removed with laser treatment. On top of all that, I have heard it hurts a lot!

但是，纹身会一直有的。纹身用的是擦不去的墨水，除非用激光清除。而且，我听说纹身也很疼。