51.   Provincial governor Sakur Tan told AFP law and order has been a perennial problem.

52.   The method will also get round the perennial problem of a shortage of organ donors.

a. + problem >>共 705
serious 4.46%
economic 3.74%
major 3.48%
financial 2.66%
biggest 2.34%
technical 1.95%
only 1.92%
big 1.91%
potential 1.91%
real 1.87%
perennial 0.14%
perennial + n. >>共 372
problem 5.37%
favorite 5.06%
power 3.92%
candidate 2.79%
contender 2.68%
powerhouse 2.48%
garden 2.48%
bed 2.37%
loser 2.27%
border 1.75%
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