unburned

形容词 unburned:

1. having not undergone oxidation

1. A sun-dried, unburned brick of clay and straw.
   风干土坯风干且未烧过的粘土与稻草做成的砖
2. A device for burning or chemically altering unburned or partially burned carbon compounds in exhaust gases.
   排气后燃器用以充分燃烧或从化学上改变废气中未完全燃烧或部分燃烧的含碳化合物的设备