1.according to 根據(jù)；按照；依照

The route that the boatmen choose varies according to the water level.
船夫選擇的路線會(huì)隨水位的變化而有所不同。

He advocates streaming children, and educating them according to their needs.
他提倡把學(xué)生按能力分班，因需施教。
2.account for 解釋；說明

Ministers should be called to account for their actions.
部長(zhǎng)們應(yīng)該對(duì)他們的行為作出解釋。

The social services account for a substantial part of public spending.
社會(huì)福利事業(yè)占了一大部分的公共支出。

3.on average 平均；通常

On average each report requires 1,000 hours to prepare.
準(zhǔn)備一份報(bào)告平均需要1,000小時(shí)。

On average, American firms remain the most productive in the world.
總體來講，美國(guó)公司在全球范圍內(nèi)還是產(chǎn)值最高。

4.worry about 擔(dān)心；擔(dān)憂

You don't have to worry about me. I'm a good swimmer.
你不用擔(dān)心我。我水性很好。

They no longer worry about the homogenization of culture.
他們不再擔(dān)心文化的同質(zhì)化。