非自然地貌
artificial feature of the terrain
非自然平衡轮廓
non-naturally balanced profile
非自然稀疏群落
Nonself-thinning population
非自然语言系统
nonnatural language system
自然死亡率
natural mortatity
instantaneous rate of natural mortality
natural mortality rate
natural mortality
自然死亡系数
instantaneous rate of natural mortality
Hermitian非自反矩阵
Hermitian anti-reflexive matrix