a. + border >>共 566
russian 3.66%
israeli 3.38%
disputed 3.37%
northern 2.77%
common 2.68%
pakistani 2.15%
albanian 2.14%
thai 2.04%
canadian 1.97%
mexican 1.96%
common + n. >>共 911
currency 3.44%
practice 3.14%
border 2.46%
problem 2.20%
cause 2.10%
criminal 1.77%
interest 1.72%
thread 1.54%
form 1.51%
share 1.34%
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