The girl in the white dress is named Little White.

穿着白色连衣裙的小女孩名叫小白。

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She was a little coy about how much her dress cost.

她对她那件衣服花了多少钱有点吞吞吐吐。

《牛津词典》

They dress like, something like the Little Mermaid or something that's familiar.

她们穿得像小美人鱼或者人们熟悉的角色。

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And then, I'm going to skip down a little bit: Though she never again called back any image of the dead man to dress up, pose, talk to and make answer, neither would she lose a new compassion for the cul-de-sac he'd tried to find a way out of, for the enigma his efforts had created.

接下来，我会跳过一些内容往下说：,虽然她从没有想起过，那个死人穿衣、摆弄姿势、,说话和回答问题时的样子，她也不会失去对他的同情，对他尝试摆脱,无路可走的困境所付出的，谜团一般的努力。

耶鲁公开课 - 1945年后的美国小说课程节选

or they dress like, something like the Little Mermaid or something that's familiar

有的打扮成小美人鱼，或者人们熟悉的角色，

街头艺人 - SpeakingMax英语口语达人

The staple party outfit for many women today is the little black dress, but in 1813, it was the little white dress that was a particular favourite.

BBC: Jane Austen's Pride and Prejudice: Party like it��s 1813

Kim, dressed in a black sequined mini-dress, posed for the cameras with an arm around sister Kourtney, also in a little black dress.

FORBES: Dash Opening: Kardashian Sisters Take New York

Chez georges is the gastronomic equivalent of the little black dress unfailingly correct, politely coquettish, and impeccably Parisian.

NPR: Excerpt: 'Hungry for Paris'