concentration
noun
ˌkɒnsənˈtreɪʃən
noun
1
the
ability
to
think
about
something
carefully
or
for
a
long
time
专心，专注;
U
She
needed
all
her
powers
of
concentration
to
stop
herself
from
slipping
on
the
icy
road.
她需要集中全部注意力才不会在结冰的路上滑倒。
Lack
of
concentration
was
a
real
problem.
注意力不集中是个真正的问题。
I
lost
my
concentration
and
fell
asleep.
我精神一放松就睡着了。
2
a
process
in
which
you
put
a
lot
of
attention,
energy
etc
into
a
particular
activity
关注; 重视;
U
concentration
on
(doing)
sth
concentration
on
your
health
对你健康的关注
concentration
on
providing
value
and
service
专注提供价值和服务
3
a
large
amount
of
something
in
a
particular
place
or
among
particular
people
集中，聚集;
C,U
[+
of
]
the
concentration
of
greenhouse
gases
in
the
atmosphere
大气中温室气体的积聚
the
concentration
of
power
in
the
hands
of
a
few
权力集中在一小部分人手里的现象
the
effect
on
trees
of
high
concentrations
of
sulphur
dioxide
around
industrial
areas
工业区周围二氧化硫高度积聚对树木的影响
people
with
blood
alcohol
concentrations
above
the
limit
血液中酒精浓度超过标准的人
4
the
amount
of
a
substance
contained
in
a
liquid
[术语] 〔液体中某物质的〕浓度;
C | technical
high/low
concentrations
Additives
are
expensive
but
are
used
in
very
low
concentrations.
添加剂很昂贵，但都以很低的浓度使用。
[+
of
]
allowable
concentrations
of
pesticides
in
drinking
water
饮用水中允许的杀虫剂浓度