What would you say was the root cause of the problem?
你認為問題的根源是什么？
The research was carried out on a modest scale.
這個研究項目開展的規模不算太大。
The experiments were carried out under simulated examination conditions.
試驗是在模擬的情況下進行的。
It is impossible to calculate what influence he had on her life.
現在無法估計他對她的生活產生過多大影響。
Fees are calculated on a sliding scale according to income.
按浮動費率制根據收入高低計算收費。