| 单词 | to neck down |
| 释义 | > as lemmasto neck down 7. Usually to neck down. extracted from neckv.1 a. transitive. To make narrower at a certain point; to reduce in width, calibre, etc. ΚΠ 1886 Philos. Trans. (Royal Soc.) 177 217 For example, a 5-inch shaft necked down to a 4-inch journal would give b=.5 inch. 1990 R. Rolley Calming Traffic Resid. Areas (BNC) 77 This can be effectively reinforced by ‘necking down’ the junction..to reduce both vehicle speeds and the crossing width of the street for walkers. 1993 Soldier of Fortune Feb. 94/2 Some was loaded with EC Blank powder, with an over-bore, hardened-aluminum ball inserted before the case was necked and the bullet seated. 2000 Combat Handguns Mar. 40/2 The .357 SIG case is actually a .40 S&W necked down to .3555 of an inch. b. intransitive. To become or be made narrower; (Engineering) to undergo a reduction in width through being subjected to tension. ΘΚΠ the world > space > extension in space > measurable spatial extent > breadth or width > lack of breadth or narrowness > become narrow [verb (intransitive)] narrowOE straita1552 straiten1601 stripe1632 to neck down1931 1931 Sci. Monthly Sept. 241 During the tensile test..the crystals necked down, the greatest reduction of area being nearly half-way between grain boundaries. 1942 Industr. & Engin. Chem. Jan. 56/2 During drawing each filament ‘necks down’ and takes a smaller diameter. 1965 P. I. Vincent in P. D. Ritchie Physics of Plastics ii. 84 It may also happen that a specimen does not neck at low speeds because there is not sufficient strain softening. 1973 J. Bronowski Ascent of Man (1976) iv. 125 When the copper wire begins to neck (that is, develop a weakness), it is not so much that it fails in tension, as that it fails by internal slipping. 1990 Outdoor Life Apr. 82/3 Any place where a lake necks down considerably has potential. The reason is that the constricted place will have current, even if only caused by wind. < as lemmas |
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