病原；
1. 起因：caulking 堵缝 | causal factor 起因 | causation 起因
2. 肇因：陽離子 CATION | 肇因 CAUSAL FACTOR | 中樞神經系統 CENTRAL NERVOUS SYSTEM
3. 因果因子：退化分布 causal distribution | 因果因子 causal factor | 因果系统 causal system
4. 病原：causal agents == 病原体 | causal factor == 病原 | causal forecasting method == 因果分析预报法
noun
1. a determining or causal element or factor
e.g. education is an important determinant of one's outlook on life
Synonym: determinantdeterminerdeterminativedetermining factor