What we want is a plan that can fill the bill, not just a fair to middling one.
我们要的策划不能马马虎虎，必须十全十美。
fair to middling 在口语中表示：“马马虎虎，还过得去”，追求完美的人肯定不想要一个只是还过得去的，而是符合要求、出类拔萃、十全十美的。因此，当美国人说"What we want is a plan that can fill the bill, not just a fair to middling one."时，他/她要表达的意思就是:"We expect a satisfying plan, not this casual one."、"We want a plan which is totally up to the mustrad, not a passable one."。
情景对白：
Terry: Sir, what do you think of this plan?
泰瑞：老板，您认为这个策划怎么样？
Boss: To be frank, what we want is a plan that can fill the bill, not just a fair to middling one.
老板：实话实说，我们要的策划不能马马虎虎，必须十全十美。
搭配句积累：
①But we have tried our best to perfect the plan.
但是我们已经尽力完善计划了。
②You always nitpick about our work.
你总对我们的工作挑三拣四。
③Revise it and give me the final plan tomorrow.
重做一份，明天我要最终的方案。
④Remember that the elephants do not bite but mosquitoes do.
记住，细节决定成败。
单词：
1. middling adj. 中等的
The Beatles enjoyed only middling success until 1963.
直到1963年，甲壳虫乐队还只是半红不紫。
He is just a man of middling height.
他仅仅是一个中等身材的男子。
This is really a very middling experience.
这真的是很普通的一次体验。
2. be up to the mustard 达到标准
substantialities whether it is up to the mustard and up to the wishes or viewpoints .
情感是人对客观事物是否符合需要、愿望和观点而产生的体验。
The valve should be tested before installation; it can be installed only up to the mustard.
安装前要进行试压检验，符合要求方可安装。
