发布时间：2016-11-03 来源：环球网校 发布人：wyznl
1 Laser beams can be used to bore metals and other hard materials.
2 The cost of elections in the United States is borne by both the government and the private sector.
3 Acknowledged as the main cause of hay fever the pollen of ragweed is very bothersome.
4 They got in quite a brawl.
5 By providing legal representation, the American Civil Liberties Union works to defend citizens against breaches of their civil rights.