Abstract: When the source and drain regions (an n.sup.- type semiconductor region and an n.sup.+ type semiconductor region) of a complementary MISFET and a p-type semiconductor region for use as a punch-through stopper are formed in a p-type well in a substrate having a p- and an n-type well, p-type impurities for the punch-through stopper are suppressed from being supplied to the feeding portion (an n.sup.+ type semiconductor region) of the n-type well.

Abstract: A machine translation system for mechanically translating a first language into a second language which displays series of questions in the first language on a display screen of a display device. A user sequentially answers the questions for the translation system mainly in the first language. The translation system parses portions of the source sentence information answered by the user, and retrieves a dictionary film in the system on the basis of the results of parsing to make a composition in the second language. The user's answers may contain the second language. The interaction between the user and the translation system allows an original text in the first language to be composed and translated in the second language in the translation system.

Abstract: A machine translation system comprises input means for inputting a sentence written in a natural language, processor for parsing the input sentence, a word dictionary memory referred to by the processor, and a memory for storing multiple-parts-of-speech disambiguating rules in the form of a table. The parts of speech of words capable of functioning as multiple parts of speech should be in the inputted sentence are determined in consideration of an array of the parts of speech by applying the multiple-parts-of-speech disambiguating rules. Additionally, rate of appearance of each part of speech which the word of the input sentence can function as is previously calculated, and the part of speech which can not be determined by consulting the disambiguating rule table is determined in dependence on whether the rate of appearance exceeds a predetermined threshold value.