planet
noun
ˈplænɪət
noun
1
on a planet
a
very
large
round
object
in
space
that
moves
around
the
sun
or
another
star
Do
not
say
不要说 ‘in a planet’. Say 而要说 on a planet.
Mercury
is
the
smallest
of
all
the
planets.
水星是行星中最小的一颗。
Is
there
life
on
other
planets?
其他行星上有生命吗？
the
future
of
Planet
Earth
地球的未来
2
sb is (living) on another planet, what planet is sb on?
used
humorously
to
say
that
someone’s
ideas
are
not
at
all
practical
or
sensible
[口] 某人异想天开〔幽默用法，表示某人的想法毫不实际或不明智〕
spoken
He
thinks
motherhood
is
glamorous
–
what
planet
is
he
on?
他觉得当母亲令人向往 — 他是外星人吗？
3
the planet
the
world
–
used
especially
when
talking
about
the
environment
地球〔尤用于谈论环境〕
a
safer
future
for
the
planet
地球更安全的未来
the
planetary
system
行星系