最終更新日：2022/12/23
例文
There
are
presently
about
200
known
objects
in
the
scattered
disc,
but
some
of
their
orbits
are
rather
uncertain.
Obviously,
most
of
these
objects
are
observed
at
perihelion
passage,
because
their
semimajor
axes
might
be
as
large
as
hundreds
of
AU
(where
they
would
not
be
observable);
if
observational
biases
are
taken
into
account,
the
scattered-disc
population
is
probably
as
large
as
[that
of]
the
classical
[Kuiper]
belt.
復習用の問題
There are presently about 200 known objects in the scattered disc, but some of their orbits are rather uncertain. Obviously, most of these objects are observed at perihelion passage, because their semimajor axes might be as large as hundreds of AU (where they would not be observable); if observational biases are taken into account, the scattered-disc population is probably as large as [that of] the classical [Kuiper] belt.
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