palaeoclimatology

Japanese child who returns to Japan from living overseas

the International Court of Justice

the Republic of Serbia

a painted bunting

暗黒時代: a historical period where social disorder is so great due to war, disease, political disorder etc. that there is little or no cultural development; Dark Ages

(economics) gross domestic product

the National Assembly (name of the national legislatures or legislative houses of several countries, such as France's lower house) / the Supreme Assembly (Uzbekistan's bicameral legislature)

classical mechanics

relating to all citizens; national / known to and beloved by all citizens; being a national and cultural icon