21.   U.S. citizenship is required for federal employment, which could be a barrier to administration recruiting goals.

a. + goal >>共 657
first 8.36%
second 5.01%
ultimate 2.94%
only 2.72%
main 2.37%
third 2.34%
winning 2.31%
the 1.62%
primary 1.29%
late 1.27%
recruiting 0.15%
recruiting + n. >>共 442
class 7.65%
trip 4.32%
effort 3.75%
visit 3.59%
process 3.07%
tool 2.60%
office 2.19%
season 1.87%
coordinator 1.77%
violation 1.67%
goal 1.09%
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