考博英语听力重点难点词组和惯用语pay off
rack one’s brains
rain cats and dogs
roll up one’s sleeves
room and board
room to let
round the clock
round the corner
so what
rush hour
second thoughts
show one’s cards
sleep like a log (top)
slip one’s mind
speak evil of sb。
stand on one’s own feet
stay up late
talk back/ answer back
That’s really tough。
the reverse is also true/vice versa
think twice (before you leap)
under the weather
walls have ears
want ad
Wear (with) a long face
What’s the point？
white elephant
