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to always kow about the most recent changes or developments in a particular situation or activity.% R: u2 X6 c, ]. c; s+ D- E
e.g. 7 C$ h& S) o) y2 Z# F7 V2 ipeople with their finger on the pulse of fashion and pop culture.
发表于 2012-3-21 15:10:55
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