decode          
verb uk/diːˈkəʊd/ us/diːˈkoʊd/
 [ T ]破译,破解;解(码) 
to discover the meaning of information given in a secret or complicated way
  Decoding the paintings is not difficult once you know what the component parts symbolize. 一旦明白了画中各部分的象征意义,也就不难搞清楚这幅画的含义了。 
 Compare: encode
  [ I or T ] language specialized正确理解(外语单词或短语) 
to understand the meaning of a word or phrase in a foreign language in the correct way
  Grammatical information helps learners to decode sentences. 语法信息有助于学习者正确理解句子的含义。