應該是: Pretty girl, 漂亮的女孩

Pretty 一般情況下作為漂亮的意思, 也可以作為"非常"的意思, girl是女孩的意思, 下面給出牛津英漢漢英詞典的釋義:

pretty |萷rjti|

A.adjective

(attractive)漂亮的 9face, woman, garden, colour, view:; 悅耳的 9tune:

not a pretty sight

有礙觀瞻

as pretty as a picture

美麗如畫

not just a pretty face

不只臉蛋漂亮

this/that is a pretty state of affairsironical

這/那糟透了

things have come to a pretty pass

事情變得很糟

to cost ([somebody]) a pretty pennycolloquial

花費（某人）一大筆錢

B.adverb

colloquial (very)非常 (fairly)相當

pretty good/bad

非常好/糟

pretty nearly or well or much finished

幾乎完成的

to be sitting pretty

處境有利

PHRASAL VERB

pretty up

transitive verb[pretty something up], [pretty up something]

colloquial 裝飾 9house:; 打扮 9child, oneself:

girl |g\衛|

noun

①(female child)女孩子

girls" school

女子學校

the girls" toilets

女廁所

②(daughter)女兒

the Smith girl

史密斯家的女兒

④dated (servant)女僕

⑤(female employee)女職員

a factory/office girl

工廠女工/女辦事員