重点讲解：
1. consist of 由…组成；由…构成；
They consist of single parts which must be joined together.
它们由许多必须连接在一起的独立部分组成。
2. at large 大多数；一般；普遍；
He is popular with the people at large.
他颇受一般群众欢迎。
3. speak of 谈起，提到；
Alan spoke of his fears for the future.
艾伦谈到了他对未来的担忧。
4. rake in 轻易赚取，大捞（一笔钱）；
The whole enterprise has raked in $1.17 billion in revenue in the last year alone.
整个企业依托这项产业仅去年就创收11亿7千万美元。