| 释义 |
ˈpush-and-pull, a. and n.
Also push and pull.
[f. push-: see pull n.2 and v. and cf. push-pull.]
A. adj. Involving pushes and pulls, esp. alternately.
a. gen.
1914H. Carrington Probl. Psychical Research xii. 371 A straight push-and-pull action is easier to accomplish than the more detailed and complicated action of forming words and letters. 1949Koestler Insight & Outlook xiii. 192 The mechanistic push-and-pull physics of the last century. 1960Times 3 Oct. (Advt. Suppl.) p. ii/2 The Skid-Stac attachment..consists of a load carrying plate and push-and-pull rack.
b. Designating (the operation of) a ‘reversible’ train, which may journey in either direction without having its engine turned about. Also, of the locomotive engine itself. See also pull-and-push s.v. pull- 3.
1939K. G. Fenelon Brit. Railways To-day iii. 61 The most hopeful solution would appear to be the adoption of the push-and-pull type of train, which can be driven from either end, and which can take extra vehicles if required. 1955C. J. Allen Gt. Eastern Railway vi. 66 The Edmonton & Cheshunt line..was..reopened, on March 1st, 1915, to serve some munition factories in the neighbourhood, and was worked by a two-coach ‘push-and-pull’ unit with 2-4-2 tank No. 1311. 1965K. Hoole in Regional Hist. Railways Gt. Brit. IV. xii. 219 Push-and-pull units, first used between Hartlepool and West Hartlepool in 1905, became a familiar sight throughout the system. 1975G. Bye in G. W. Knight Jackson Knight v. i. 367 A much planned..trip on the ‘Tivvy Flyer’, the push and pull train on the Tiverton and Bampton branch-line, was, alas, never made.
B. n.
a. U.S. Mil. (See quot. 1929.) Also attrib.
1920Official Hist. 315th Infantry U.S.A. 28 The greater part of the time was devoted to..the ‘push and pull’ exercise. 1921F. T. Floyd Company F Overseas 37 These rides remind a soldier of that bit of army exercise popularly known as ‘push and pull’. 1929Papers Mich. Acad. Sci., Arts & Lett. X. 317 Push and pull,..sighting and aiming drill.
b. fig. Tug of war.
1958Spectator 4 July 19/3 The dramatic centre of the book is..the push-and-pull between Yule and his devoted but mutinous daughter. |