take interest in 的interest是不是可数名词

即是可数名词又是不可数名词，在take
interest
in 中的interest时不可数的。表示对什么产生兴趣
interest有以下意思。
1.
兴趣;关注;爱好[C][U][(+in)]
I
developed
an
interest
in
the
machine.
我对这机器发生了兴趣。
I
have
lost
my
interest
in
chemistry.
我对化学已不感兴趣。
2.
趣味性[U][(+to)]
Local
color
added
interest
to
the
novel.
地方色彩增加了这部小说的吸引力。
3.
感兴趣的事物或人[C]
His
two
great
interests
in
life
are
music
and
painting.
他生活中的两大兴趣是音乐和绘画。
4.
利益;利害;同业;同行[P1]
We
work
for
our
common
interests.
我们为共同的利益而工作。
5.
利息[U]
I
borrowed
the
money
at
5%
interest.
我以五分利息借了那笔钱。
6.
股份,股权[C][(+in)]
He
has
an
interest
in
the
company.
他在这家公司拥有股份。
7.
重要性;影响[U][(+with)]
Her
interest
with
him
is
considerable.
她对他的影响相当大。