31.   Serbs have prevented regular shipments of aid into the enclave for several weeks.

32.   Several African countries said they were reinforcing border controls to prevent shipments of British meat, but few are major importers.

33.   The government was also studying steps to prevent shipments of radioactive materials from traversing Cape Horn in the future.

v. + shipment >>共 348
delay 5.14%
stop 4.51%
halt 3.58%
block 3.11%
receive 2.91%
resume 2.49%
suspend 2.44%
send 2.39%
prevent 1.71%
make 1.56%
prevent + n. >>共 1204
attack 3.54%
violence 1.93%
spread 1.72%
people 1.65%
company 0.97%
infection 0.92%
recurrence 0.88%
problem 0.87%
cancer 0.87%
disease 0.85%
shipment 0.15%
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