重点讲解：

1.get rid of摆脱；除去
Fortunately, like most thyroid cancer patients, she needed only a single dose of radiation to get rid of the cancer.
幸运的是，和大多数罹患甲状腺癌的患者一样，她只需要单剂放疗即可摆脱癌症的困扰(7;!3zIDZzeclD(。

2.bring down降低；使倒下

Opinion polls show that most Americans have lost hope that politicians can bring down the high unemployment rate.
民调显示，大多数美国人已经对政治家能够降低高企的失业率失去了希望9844b4]*CR8[u5Qw([B*。