柯林斯词典lacuna /ləˈkjuːnə/ (lacunae) 1. N-COUNT If you say that there is a lacuna in something such as a document or a person's argument, you mean that it does not deal with an important issue and is therefore not effective or convincing. (文件、论点等中对重要问题的)缺漏[正式] 返回 lacuna剑桥词典an absent part , especially in a book or other piece of writing （书或文章中）缺漏，脱漏，空白 返回 lacuna