Unburned

例句:

• That some unburned carbon is present in a flame is shown by the fact that whenever a cold object is held in the flame, it becomes smoked or covered with soot. 伯莎M.克拉克. 科学通论.
• Sand should abound in the clay in a certain proportion, or be mixed therewith, otherwise the clay, whether burned or unburned, will crumble. 威廉·亨利·杜利特. 世纪发明.
• If the quantity of air is insufficient, the carbon particles remain unburned and form soot. 伯莎M.克拉克. 科学通论.
• If a cold object is held in the bright flame of an ordinary gas jet, it becomes covered with soot, or particles of unburned carbon. 伯莎M.克拉克. 科学通论.

手打:肖恩