Every profession or trade, every art, and every science has its technical vocabulary. Different occupations, however, differ widely in the character of their special vocabularies. In trades and handicrafts, and other vocations, like farming and fishery, that have occupied great numbers of men from remote times, the technical vocabulary is very old. It consists largely of native words, or of borrowed words that have worked themselves into the very fiber of our language. Hence, though highly technical in many particulars, these vocabularies are more familiar in sound, and more generally understood than most other technicalities. The special dialects of law, medicine, divinity and philosophy have also, in their older strata, become pretty familiar to cultivated persons and have contributed much to the popular vocabulary. Yet every vocation still possesses a large body of technical terms that remain essentially foreign, even to educated speech. And the proportion has been much increased in the last fifty years, particularly in the various departments of natural and political science and in the mechanic arts. Here new terms are coined with the greatest freedom, and abandoned with indifference when they have served their turn. Most of the new coinages are confined to special discussions, and seldom get into general literature or papers, and everybody is soon talking about it--as in the case of the Roentgen rays and wireless telegraphy. Thus our common speech is always taking up new technical terms and making them commonplace.

(1)Special words used in technical discussion ______.

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A．never last long

B．should be confined to scientific fields

C．may become part of common speech

D．are considered artificial language speech

(2)In recent years, there has been a marked increase in the number of technical terms in the terminology of ______.

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(3)The writer of the article was undoubtedly ______.

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(4)The author's main purpose in the passage is to ______.

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