重点讲解：
1. a total of 总数；总额；合计；
例句：A total of twenty letters were received last month.
上个月共收到20封信UKnqKu|(Q)#~DsKfRtn@。
2. amount to 合计；共计；
例句：His investments amount to five million dollars.
他的投资额达五百万元~JLK2rbT.jzaX)hCvt。
3. according to 据…所说；按…所载；
例句：According to industry statistics, the assets of money funds have grown sharply since the credit crisis began to intensify last summer.
据行业统计数据显示，自去年夏天信贷危机开始严重起货币基金的资产就开始急剧增长plnO,PKotwf|cG。
4. be based on 以…为基础；
例句：His theory is merely based on supposition.
他的理论只是根据推测而提出的xl4~TMRm_0Q%4Cs。
5. deal with 处理；应付；与…打交道；
例句：Firstly, let us deal with the most important issue.
首先让我们来处理最紧要的问题V&OumpTvJ~]-。