4 k! `" R+ Q+ C/ x3 p0 W1 P& f2 u( Z答案下期揭晓作者: ludy 时间: 2012-3-21 15:15
C # |9 S0 f2 Q _7 m9 R
to always kow about the most recent changes or developments in a particular situation or activity.2 P- w, G- v5 Y [" u
e.g. & J5 e3 F$ a% H$ y: Q# @people with their finger on the pulse of fashion and pop culture.