textbook
noun
adj
ˈtekstbʊk
noun
1
a
book
that
contains
information
about
a
subject
that
people
study,
especially
at
school
or
college
教科书，教材，课本
a
biology
textbook
一本生物教科书
adj
2
used
to
describe
something
that
is
done
exactly
as
it
should
be
done,
or
happens
exactly
as
it
should
happen
规范的; 标准的
textbook
case/example
The
advertising
campaign
was
a
textbook
example
of
how
to
sell
a
product.
这个广告活动是如何销售产品的一个标准例子。