odorless

基本解释

Methane is a colorless, odorless and flammable substance which forms a major component in natural gas.
甲烷是一种无色，无味，易燃物质，是天然气的重要组成部分。
Colorless, odorless carbon monoxide is a deadly poison that kills nearly 500 unsuspecting people a year.
无色、无味的一氧化碳是一种致命的毒气，每年约有500名无辜群众死于此。
Hutchinson is annoyed, but says they're planning on gassing the brothers out floor by floor; they're using a colorless, odorless gas.
汉金森觉得他烦人，但还是告诉了他，警方将一层一层地用气体把他们俩兄弟熏出来，警方使用的是无色无味的气体。

Well many believe that vodka is a colorless, tasteless, odorless spirit (except for the ethereal qualities), but in reality vodka DOES have flavor!
FORBES: How To Taste Spirits
To compensate for this, egg producers in the US commonly used to spray eggs with a thin layer of odorless, colorless mineral oil.
FORBES: Natural Protection
Invisible and, often odorless, green leaf volatiles emitted from vegetation act as a defense mechanism, communicating to other foliage that danger is near.
ENGADGET: Chemical sensors could detect plants' cries for help, reduce need for pesticides