31.   The National Park Service says the delay occurred because of problems with a new elevator cab, which took more than a year to install.

32.   Vallejo said scheduled flights were not affected, but Transportation Minister Luis Chang indicated that some delays had occurred.

n. + occur >>共 919
incident 6.74%
accident 6.06%
attack 4.78%
explosion 4.08%
blast 2.84%
death 2.35%
shooting 2.24%
problem 1.82%
crash 1.75%
injury 1.56%
delay 0.20%
delay + v. >>共 393
be 35.75%
cause 2.91%
mean 2.87%
give 2.49%
make 1.93%
come 1.89%
have 1.77%
allow 1.66%
say 1.66%
cost 1.47%
occur 1.21%
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