1.on average 平均

例句:American shares rose, on average, by 38%.
美国股票价格平均上涨了38%。

2.force up 迫使上升

例句:Increasing the wages of the bus crews will force up fares.
增加公共汽车人员的工资将迫使车票涨价。

3.shut down 关闭；倒闭

例句:It is required by law to shut down banks which it regards as chronically short of capital.
法律规定资金长期短缺的银行必须关闭。

4.depend on 依赖；依靠

例句:The risk and severity of sunburn depend on the body's natural skin colour
晒伤的风险和严重程度取决于人体的自然肤色。