Ozone layer back to full strength(臭氧层恢复原状）

    According to a new UN report, the Ozone,Earth's protective layer,will returm to full strength by 2048."full strength"is a reference to pre-1980s Ozone levels before the early sings of climate change first became apparent the report states that the.phasing out CFCs used in refrigerators and aerosols is largely responsible for the layer's recovery.

Liability to the president(总统的负累）

     According to paris match magazine,french first lady carla bruni has delayed the recording of her fourth album over fears that her music career could alienate voters. Besma lahouri , author of a new biography of bruni, called her a liability to president Nicolas sarkozy,who has faced protests over his handing of the economy.transport and public services were disrupted last thursday as people protested against Sarkozys economic measures

To trade barbs （唇枪舌剑）

    The topic of the  9/11 terrorist attacks fresh tensions  as  US president barack obama and lranian  leader mahmoud Ahmadinejad traded barbs. Speaking at the UN general assembly last week ,Ahmadinejad  reiterated conspiracy theory clarried out the 9/11 attacks to benefit lsyael.Obama responded by calling the remarks offensive and hateful.