smokeless [ˈsmoʊkləs]

例句:

• Neither of the above substances gives smokeless powders an intense coloration.
  上述各物质,没有一个能使无烟药强烈着色.
  
• The nicramine ethers perform two functions in the smokeless powder composition.
  硝胺醚在无烟火药成份中有两种作用.
  
• There are chemical fuels that are clean and smokeless.
  有些化学燃料是清洁无烟的.
  
• So what is this revolutionary smokeless method?
  来自VOA
• The site produced smokeless fuel in the form of briquettes for 50 years.
  来自BBC
• He warned of the dangers of secondhand smoke and pushed for a smokeless society.
  来自WSJ