initial display to selection. This device is not simple as these two figures, more special service can be made to translator by it. In the translation aids, the author showed the third figure: "A relatively trivial addition would be a dictionary. The translator selects a word or sequence of words and gives a command to cause them to be looked up…This new window gives the effect of overlaying some portion of the windows already present. In this case, the new window contains a deceptively simple dictionary entry for the selected word." What's more, the device has many other features. For example, the simplicity of the dictionary entry, words Syntax and Semantics will be included when pointing to symbols, modifiable dictionary entries and the temporary amendments make this device more practical. Then, machine translation be explained. "One of the options that should be offered to a user of the hypothetical system I have been describing, at a fairly early stage, be a command that will direct the program to translate the currently selected unit. What will happen when this command is given will be different at different stages of the system's development. But a user of the system will always be empowered to intervene in the translation process to the extent that he himself specifies. If he elects not to intervene at all, a piece of text purporting to translate the current unit will be displayed in the lower window of his screen. He will be able to edit this in any way he likes, just as post-editors have done in the past. Alternatively, he may ask to be consulted whenever the program is confronted with a decision of a specified type, when certain kinds of ambiguities are detected, or whatever. On these occasions, the system will put a question to the human translator. He may, for example, ask to be consulted on questions of pronominal reference." In this part, idea of translation memory was shown as a dictionary operation. "Suppose, for example, that a word is put in the local store – that part of the dictionary that persists only as long as this document is being worked on – if it occurs in the text significantly more frequently than statistics stored in the main dictionary indicate. A phrase will be noted if it occurs two or three times but is not recognized as an idiom or set phrase by