ozone
noun
ˈəʊzəʊn
noun
1
a
poisonous
blue
gas
that
is
a
type
of
oxygen
[术语] 臭氧〔有毒蓝色气体，氧的同素异形体〕
technical
2
air
near
the
sea,
thought
to
be
fresher
and
healthier
[非正式] 〔近海处的〕清新空气
informal