本讲为2007年下半年新的教学内容，请对照讲义，练习册和教材听声音！
  Lay off employ fair
  Take up
  This chapter is about to/refers to  the transformation of heat into power.
  A crowded people gather on the spot.at the scene of the accident spontaneously.
  The quarrel originated from the misunderstanding/mistakes
  The army took over the city after 1949.
  For your health ,you ushouldn’t take on too smuch work.
  Lose one’s
  Sum up
  Evidence
  In a word
  Ahead of time
  Sleep asleep sleeping

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