odorless

形容词 odorless:

1. having no odor
   同义词：odourless, inodorous

1. A colorless, odorless, tasteless, gaseous mixture, mainly nitrogen(approximately78 percent) and oxygen(approximately21 percent) with lesser amounts of argon, carbon dioxide, hydrogen, neon, helium, and other gases.
   空气一种无色、无嗅、无味的气体混合物，主要由氮气(约占78％)和氧气(约占21％)组成，还有少量的氩、二氧化碳、氢、氖、氦及其它气体

o.dor.less

adj.（形容词）
Having no odor.
没有气味的

【引伸】
o.dorlessly
adv.（副词）
o.dorlessness
n.（名词）