| 释义 |
ˈlead-in
[f. vbl. phr. to lead in (lead v.1 2); cf. leading-in adj. (leading ppl. a. 1 c).]
1. a. A wire that leads in from outside, esp. one connecting an outdoor aerial with an indoor receiver or transmitter. Freq. attrib.
1913Wireless World Apr. p. xxxvii/2 The lead was taken from the mast in the garden down to the instruments, which were now moved to the ground floor. This gave me a lead-in wire of 65 ft. 1913Work 14 June 217/3 Lead in, about 40 ft. insulated. 1924Wireless World 10 Sept. 679/2 (caption) By fixing your lead-in in this way opening and closing the window is not interfered with. 1934Practical Wireless V. 62/1 (heading) A weather-proof lead-in. Ibid., About 6 in. from the end of the lead-in wire, bind round with a 3 in. length of..copper wire. 1950Jrnl. Sci. Instrum. XXVII. 231 (heading) Insulated power lead-in for vacuum systems.
b. A wire in an electric lamp that carries the current between the cap and the filament or electrode. Freq. attrib.
1929Encycl. Brit. VIII. 291/1 The lead-in wires which carry the current to the filament have to be sealed through the glass. 1962N. H. Codling in G. A. T. Burdett Automatic Control Handbk. viii. 6 Nickel-steel of 42 per cent composition, when copper-clad, is used for the lead-ins of lamps. 1970A. Byers Home Lighting ii. 45 (heading) Lead-in wires.
2. transf. and fig. An introduction, opening, etc.
1928Melody Maker Feb. 188/2 It is electrifying to hear the solo instrumentalists rip in on some unexpected lead-in. 1952W. R. Burnett Vanity Row xiv. 118 Like a radio announcer with an embarrassingly far-fetched lead-in to the commercial. 1958[see lead-out 1]. 1958Economist 15 Nov. 579/2 The fantasy life portrayed [i.e., in certain children's comics] is simply a lead-in to the more elaborate and still more depressing dreamworld of the women's magazines. 1962W. Nowottny Lang. Poets Use iv. 90 That opening is seen to be not an embarrassed and forced lead-in to a technically necessary comparison but rather a first and major step in the development of the whole. 1963P. Moyes Murder à la Mode i. 20 Helen Pankhurst finished her lead-in blurb to the Collections feature. 1963D. Ogilvy Confessions Advertising Man (1964) viii. 131 Don't mess about with irrelevant lead-ins. Start selling in your first frame. 1971Daily Tel. 11 Feb. 30/6 Workers who agree in writing to operate incentive bonus schemes should get a ‘lead-in’ payment of {pstlg}1 a week. 1972D. Haston In High Places xii. 155, I heard the full story about Harsh's death and began to get some lead-in to the political infighting that had been going on. 1973Listener 30 Aug. 295/1 Keep the lead-in short; some [news]papers enforce a 14-word limit on opening sentences. |