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to always kow about the most recent changes or developments in a particular situation or activity.3 l3 a6 u6 z+ g! u% q2 }. ]
e.g.3 F- E) T) z& M5 Z- T+ X1 W
people with their finger on the pulse of fashion and pop culture.
发表于 2012-3-21 15:10:55
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