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第3001节（第150001-150050行） (3001/3207)
about
50
percentlarger
than
that
of
lucy
in
gross
terms
and
not
much
less
large
proportionally,
so
it
was
theeinstein
of
its
day.
no
persuasive
reason
has
ever
been
adduced
for
why
hominid
brainssuddenly
began
to
grow
two
million
years
ago.
for
a
long
time
it
was
assumed
that
big