200 college kids were taught to play some unfamiliar video games.
出自-2016年6月听力原文
That people often experience trouble sleeping in a different bed in unfamiliar surroundings is a phenomenon known as the "first-night" effect.
2017年12月四级真题（第一套）阅读 Section C
To take a closer look, her team studied healthy people as they slept in the unfamiliar environment of the university's Department of Psychological Sciences.
2017年12月四级真题（第一套）阅读 Section C
英语六级真题
Imagine how intimidating it be for prospective students unfamiliar with the complexities of higher education to navigate this kind of information and then identify which schools are the best fit.
出自-2015年12月阅读原文
They must determine the risk of jeopardizing a job offer or a collaboration proposal from those who are wary of— or unfamiliar with—open science.
2017年12月六级真题（第二套）阅读 Section B
柯林斯高阶英汉双解学习词典释义
ADJ-GRADED
不熟悉的；陌生的
If something is unfamiliar to you, you know nothing or very little about it, because you have not seen or experienced it before.