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Rarified
[reәrifaid]
例句:
Air
is
more
dense
at
the
surface
of
the
earth
,
and
becomes
continually
more
rarified
as
the
altitude
increases
,
until
it
becomes
an
indefinitely
tenuous
ether
.
Edward W. Byrn.
十九世纪发明进展
.
阿伦编辑