重点讲解：
1. shoot down 击落(飞机、直升机、导弹等)；
His plane was shot down over North Vietnam in 1967.
他的飞机于1967年在北越被击落SXs2]P%NbyykLxG。
2. look into 考察；调查；研究；
They set up a working party to look into the issue.
他们设立了一个特别工作组来调查这个问题;^^;2tyEDIq。
3. be accused of 指控；控告；
Her assistant was accused of theft and fraud by the police.
她的助手被警方指控犯有盗窃和欺诈罪vMV4p45hT)%^。
4. step back 退一步，置身事外(思考)；
In a country where politicians rarely make self-sacrifices, her step back from power was regarded as astonishing.
在印度，很少有政治家愿做出自我牺牲，因此，她退出权力中心的做法令人惊讶j7)RM1Oy^MAf1。