beaver
noun
verb
ˈbiːvə
noun
1
a
North
American
animal
that
has
thick
fur
and
a
wide
flat
tail,
and
cuts
down
trees
with
its
teeth
河狸，海狸
verb
2
to
work
very
hard,
especially
at
writing
or
calculating
something
[非正式] 卖力地干，努力工作〔尤指写作或计算〕
[+
at
]
He’s
been
beavering
away
at
his
homework
for
hours.
他忙着做作业有几个小时了。