animal kingdoms 生物界
plant kingdoms 植物界
kingdom come 来世/未来状态（固定表达）
kingdoms of nature 自然界各领域
1. The ancient kingdoms were often at war with each other.
古代的多个王国经常彼此交战。
2. Scientists study different kingdoms of living organisms.
科学家研究不同的生物界分类。
3. These kingdoms developed unique cultures over centuries.
这些王国在几个世纪中发展出独特文化。
A: How many kingdoms existed in that historical period?
A：那个历史时期有多少个王国存在？
B: There were several kingdoms competing for power.
B：有几个王国在争夺权力。
1) 多个独立的王国或国家
2) 生物学中的界分类单位
3) 比喻不同的系统或领域
1. 由国王或女王统治的多个国家或领土。
e.g. The kingdoms of Europe had complex alliances.
欧洲的多个王国有复杂的联盟关系。
2. 生物学中用于分类生物的界，如动物界、植物界。
e.g. Animals belong to different biological kingdoms.
动物属于不同的生物界。
noun
1. Plural of kingdom; refers to multiple countries or regions ruled by kings or queens, or different classified domains in biology or metaphorical systems.
Synonym: realms, domains, states