1. You are always doing something marginal when the boss drops by your desk. 当老板走到你的桌前时，你总是在做些无关紧要的事。
2. A novel transmission pricing method based on marginal cost theory is presented. 应用边际成本理论提出了一种新的输电定价方法。
3. The equilibrium condition of personal education investment is that marginal cost equals to marginal revenue. 文章认为，个人教育投资的均衡条件是边际成本等于边际收益。
英英解释
adj.
1. at or constituting a border or edge
2. of questionable or minimal quality
3. of a bare living gained by great labor
4. just barely adequate or within a lower limit
5. producing at a rate that barely covers production costs
6. being close to a lower limit or or of lower class
