efficient
adj
ɪˈfɪʃənt
adj
1
if
someone
or
something
is
efficient,
they
work
well
without
wasting
time,
money,
or
energy
有效率的; 高效能的;
a
very
efficient
secretary
高效率的秘书
an
efficient
use
of
land
土地的有效使用
Lighting
is
now
more
energy
efficient
.
照明设备现在更节能。