Meaning: This sentence describes the girl's doll as being attractive and pleasing to the eye.
Choice of Words: The words "she", "has", "a", "pretty", "doll" are all common words that are easy for English learners to understand. The word "she" refers to a female person, "has" means to possess something, "a" is used to indicate one of something, "pretty" means attractive or pleasing to the eye, and "doll" refers to a toy figure of a person or animal.