What would you say was the root cause of the problem?

　　你認(rèn)為問(wèn)題的根源是什么？

　　The research was carried out on a modest scale.

　　這個(gè)研究項(xiàng)目開(kāi)展的規(guī)模不算太大。

　　The experiments were carried out under simulated examination conditions.

　　試驗(yàn)是在模擬的情況下進(jìn)行的。

　　It is impossible to calculate what influence he had on her life.

　　現(xiàn)在無(wú)法估計(jì)他對(duì)她的生活產(chǎn)生過(guò)多大影響。

　　Fees are calculated on a sliding scale according to income.

　　按浮動(dòng)費(fèi)率制根據(jù)收入高低計(jì)算收費(fèi)。