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necessarily preclude
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1.
Economists
think
of
knowledge
,
unlike
physical
goods
,
as
"non-rival"
:
use
by
one
person
does
not
necessarily
preclude
use
by
others
.
经济学家
认为
知识
并不
像
有形
产品
，
是
具有
非
竞争性
的
：
一
个人
使用
并
不会
排除
他人
使用
。
jīng jì xué jiā
rèn wéi
zhī shi
bìng bù
xiàng
yǒu xíng
chǎn pǐn
,
shì
jù yǒu
fēi
jìng zhēng xìng
de
:
yī
gè rén
shǐ yòng
bìng
bú huì
pái chú
tā rén
shǐ yòng
。
www.ecocn.org
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