un·fa·mil·i·ar·i·ty
noun/ˌʌnfəˌmɪliˈærəti/
/ˌʌnfəˌmɪliˈærəti/
[uncountable]- the fact of not knowing or recognizing somebody/something
陌生的；不熟悉的；不认识的 - the unfamiliarity of these new faces
这些新面孔的陌生
- the unfamiliarity of these new faces
- unfamiliarity (with something) the fact of having no knowledge or experience of something
无…的知识（或经验） - He admits his relative unfamiliarity with this literature.
他承认他对这些文献相对不熟悉。
opposite familiarity (1) - He admits his relative unfamiliarity with this literature.