nonnegativity conditions

例句：

1. 1. The nonnegativity of the environment is crucial forhuman health.
   环境的非负性对人类健康至关重要。
2. 2. The nonnegativity of the datasuggests that the model is accurate.
   数据的非负性表明模型是准确的。
3. 3. The nonnegativity of the law prohibits discriminationbased on race or gender.
   法律的非负性禁止基于种族或性别的歧视。