variable简单

They chose this particular behavior for three reasons, according to study co-author Eric Schwitzgebel, a philosopher at the University of California, Riverside: students’ attitudes on the topic are variable and unstable, behavior is easily measurable, and ethics literature largely agrees that eating less meat is good because it reduces environmental harm and animal suffering.

据该研究的合著者、加州大学河滨分校的哲学家埃里克·施维茨格贝尔说，他们选择这一特定行为有三个原因：学生对这一话题的态度多变且不稳定；这种行为很容易衡量；伦理学文献大体上认同少吃肉是好的，因为这能减少环境危害和动物痛苦。

variable

多变的

Psychologist Nina Strohminger at the University of Pennsylvania, who was not involved in the study, says she wants the effect to be real but cannot rule out some unknown confounding variable.

未参与该研究的宾夕法尼亚大学心理学家尼娜·斯特罗明格说，她希望这种效果是真实的，但无法排除某个未知混杂变量的影响。

Even though there is plenty of evidence that the quality of the teachers is the most important variable, teachers' unions have fought against getting rid of bad ones and promoting good ones.

尽管有大量证据表明教师素质是最重要的变量，教师工会却一直反对辞退差教师、提拔好教师。