検索結果- 英語 - 英語
検索内容:
layer up
verb
deep scattering layer
noun
(oceanography)
A
layer
of
the
ocean
lying
usually
300-500
metres
deep
composed
of
dense
concentrations
of
pelagic
animal
life,
that
moves
depending
on
the
time
of
day,
up
at
night
and
down
during
the
day.
It
sometimes
appear
as
if
it
were
the
seabed
on
sonar
scopes,
due
to
the
density
of
life
in
the
layer.
