Neither…nor…. 不A不B （Adv….Adv…）

不A不B is a commonly used express in Chinese which could have different indications depending on the meaning of A and B.
(1) If A and B are monosyllabic verbs which are similar in meaning, 不A不B is an emphatic negative form.
        不吃不喝 don’t eat anything at all
         不闻不问 not bother to ask or to listen

(2) If A and B are opposite in meaning, 不A不B mans:
        a. just right (positive)
        不大不小 （neither big nor small） just fit
         b. neither …nor…(negative)
         不中不西 ( neither Chinese nor Western) not a right style
        不上不下 (neither up nor down) be suspended in mid air

(3) If A and B are related in meaning, A is the cause, B shows the result.
      不看不行 ( If not…, then not…)
         It won’t be all right unless you take a look.
substitutive drills:

这件衣服                   大          小           很合适。
这种款式                  中           西           没有人喜欢。
他们的产品     不      好   不    坏     ，  马马虎虎。
我们                       减价         行           打不开销路。