woerter = {} 
fobj = open("woerterbuch.txt", "r") 
for line in fobj: 
    line = line.strip() 
    zuordnung = line.split(" ") 
    woerter[zuordnung[0]] = zuordnung[1] 
fobj.close()

fobj2 = open("ausgabe.txt", "w")                   #1
for engl in woerter:
   print(engl, woerter[engl], sep=":", file=fobj2)  #2
fobj2.close()