shoal
noun
ʃəʊl
noun
1
a
large
group
of
fish
swimming
together
鱼群;
[+
of
]
a
shoal
of
fish
一大群鱼
2
a
small
hill
of
sand
just
below
the
surface
of
water
that
makes
it
dangerous
for
boats
浅滩，沙洲