过度拥挤 (Guòdù yōngjǐ) - excessive overcrowding: It indicates an extreme level of overcrowding that surpasses normal limits and poses significant challenges.
空间有限 (Kōngjiān yǒuxiàn) - limited space: This term refers to situations where there is not enough room available for all the people or things that need to be accommodated.
人口密度 (Rénkǒu mìdù) - population density: It measures the number of individuals living in a specific area, which can contribute to overcrowding if it exceeds the capacity of that area.