a. + airline >>共 754
major 8.79%
national 4.93%
commercial 3.79%
the 3.48%
foreign 3.33%
european 2.93%
domestic 2.81%
international 2.68%
new 2.68%
regional 2.44%
european + n. >>共 813
country 9.46%
currency 5.89%
market 3.62%
nation 2.94%
leader 2.24%
company 1.92%
government 1.63%
tour 1.51%
ally 1.51%
official 1.37%
airline 0.55%
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