Hills Like White Elephants

The story "Hills Like White Elephants" written by Hemingway is about an American man and her girlfriend's arguement. The girl has pregnant and wants to keep this baby. But her boyfriend, an American man,doesn't want this baby. He is trying to convince the girl to abortion. This story looks like very simple, but it's hard to understand. I need to think a lot to figure out what the story is talking about. A lot of meaning are behind the lines.