重点讲解：
1. shoot down 击落(飞机、直升机、导弹等)；
He was able to shoot down a flying bird with the bow and arrow.
他张弓搭箭能射落空中的飞鸟。
2. on the heels of （时间上）紧跟…之后，紧接着；
On the heels of unemployment problem came a slump.
失业问题之后，紧接着又发生了经济不景气。
3. rein in 控制；约束；
Electronics goods sales are suffering as consumers rein in spending.
随着消费者控制开支，电器商品的销售受到了影响。
4. be included in 把…列为…的一部分；把…算入；
His works are included in this anthology of stories.
这本小说集收录了他的作品。