11.   As long as such a system exists and is tolerated, public reputations will become tarnished, and public skepticism and mistrust about government will continue.

12.   Because no commercial system existed for the completely computerized operating and navigational system that Clark had envisioned for Hyperion, he decided to create his own.

13.   A spokeswoman for the exchange declined to expand on the statement, even to say whether the trading system exists yet.

14.   All of the available statistics show that a racial caste system still exists in this country and that black people, as a race, are its victims.

15.   Brown said he did not know if a perfect system could exist, even in an eight-team playoff.

16.   But federal prosecutors said there was no evidence that such a system ever existed.

17.   But no such system yet exists for fruit and vegetables, domestic or imported.

18.   But no reliable system yet exists and much more diplomatic groundwork needs to be done before Washington settles on a plan.

19.   But other publications, including Al Quds, say no such licensing system now exists.

20.   But without ABS and traction control systems, stability control systems could not exist.

n. + exist >>共 1655
problem 4.39%
evidence 2.06%
possibility 1.59%
opportunity 1.28%
difference 1.17%
life 1.15%
condition 1.10%
technology 1.04%
system 0.84%
group 0.78%
system + v. >>共 725
be 25.00%
work 4.60%
have 4.07%
allow 2.15%
use 1.82%
fail 1.48%
make 1.44%
need 1.42%
provide 1.31%
require 1.03%
exist 0.34%
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