DICT.TW Dictionary Taiwan

 nail down
 用釘子釘牢,使確定下來,要明確表態,使履行諾言

 nail down
      v 1: succeed in obtaining a position; "He nailed down a spot at
           Harvard" [syn: nail, peg]
      2: define clearly; "I cannot narrow down the rules for this
         game" [syn: pin down, peg down, narrow down, narrow,
          specify]
      3: make final; put the last touches on; put into final form;
         "let's finalize the proposal" [syn: finalize, finalise,
          settle]