The difference in price is so marginal that it's not worth considering.

### 解释 marginal 是形容词，来自名词 margin（边缘、页边空白），加上后缀 -al 构成形容词，意思是"边缘的、微小的、不重要的"。在经济学中常指"边际的"，这里指"微不足道的"。