| 释义 |
half-time
1. a. Half of a (particular) period of time.
1645E. Pagitt Heresiogr. (1661) 282 Months, weeks, daies, and half-times, and such like Chronology.
b. (See quot.)
1860O. W. Holmes Elsie V. ii. (1887) 21 It is customary to allow half-time to students engaged in school-keeping,—that is, to count a year, so employed,..as equal to six months of the three years.
c. Half the usual or full time during which work is carried on. (In quot. 1862 as adv.)
1861Weekly Times 13 Oct., Notices of cotton-mills being put upon half-time. 1862H. Spencer First Princ. ii. viii. §72 Factories are worked half-time, or close entirely.
d. (See quot., also 3 below.)
1904A. B. F. Young Compl. Motorist iv. 118 All six valves are interchangeable and mechanically operated by rods worked from a cam shaft which is geared at half-time from the crank-axle.
e. Half the tempo of the performer; an accompaniment at half the tempo of the performer (see quot. 1961).
1938D. Baker Young Man with Horn iv. 265 They went into half-time together for a short coda. 1961A. Berkman Singers' Gloss. Show Business 27 Half-time, while the singer continues singing the melody in the normal manner, the rhythmic complement is beat only half as fast as the original count.
f. Chem. (See quot.)
1957A.S.M.E. Gloss. Terms Nuclear Sci. (1958) 72/2 Half-time of exchange, the time required for half the net realizable exchange of atoms in a chemical exchange reaction to take place.
2. In Football, etc., The time at which the first half of the game is completed.
1871A. G. Guillemard in Bell's Life 1 Apr., The call of ‘Half-time’ found the play exactly in the centre of the ground. 1894Times 23 Feb. 4/2 Before half-time he kicked two goals out of the three registered for Middlesex.
3. attrib., as in half-time system, the system by which school-children are enabled to attend school for half the usual time and spend the other half at some remunerative occupation; so half-time register, a register of half-time scholars. half-time survey of ships: see quot. 1894. half-time shaft = half-speed shaft (see half- II. n).
1861Illustr. Lond. News 13 Apr. 353/3 The extending the half-time system. 1887Educational Department Circular No. 271. 7 Apr., A separate half-time register will be kept of all half-time scholars. 1894H. Pasch From Keel to Truck 466 Half Time Survey, this applies to wooden and composite vessels, on either of which a special survey is held, when about one half of the time for which they may have been classed, has elapsed. 1904A. B. F. Young Compl. Motorist iii. 49 The projecting part of a cam fixed on the half-time shaft. 1908Westm. Gaz. 15 Oct. 4/2 The lubrication of the engine is carried out by a Dubrulle mechanical lubricator, fitted on the dash-board, and operated by an eccentric on the half-time shaft. |