translation.en: So I had to compromise with operational research work, which had the intellectual challenge that interested me and the commercial value that was valued by the clients: things like scheduling freight trains, time-tabling buses, stock control, lots and lots of stock control.
translation.zh: 因此我不得不在研发工作上做出让步。 放弃那些吸引我的、充满智慧的挑战性课题， 转而寻求客户所看重的商业价值： 如货车时刻表， 公交车时间编排，股票控制， 许多许多的股票控制。