6 q: Y2 {# W. |& g" m% M牛高8双解：- X$ W G, i+ _/ A) R% G; L
trade-off: 8 h" S0 B. Y4 k" u& Pthe act of balancing two things that are opposed to each other （在相互对立的两者间的）权衡，协调9 S8 T1 l. _# F) U2 K/ o$ p4 @
◆ a trade-off between increased production and a reduction in quality 对产量增加和质量下降的权衡
发表于 2017-7-1 17:58:54
