| 释义 |
on-off, a.
[f. on adv. + off adv.]
1. Of a switch or the like: that turns something on or off.
1946Nature 12 Oct. 501/1 In the counting and control circuits, all valves are used entirely as on-off elements, not as amplitude-sensitive elements. 1958Times Rev. Industry Oct. 92/3 Photoelectric equipment designed to perform on-off switching operations. 1960Times 15 Mar. 18/4 The overdrive operation is therefore more complicated than the simple on-off switch. 1973D. Francis Slay-Ride viii. 96 Behind me..stood my portable television... I..found the on-off switch, and turned the volume up to maximum.
2. = off and on a.
1953[see hunt v. 7 b]. 1962John o' London's 19 July 66/2 Forget the hoo-ha, the on-off engagements. 1965H. I. Ansoff Corporate Strategy (1968) vii. 108 Concern with strategy had followed an ‘on-off’ cycle attuned to the appearance of major strategic opportunities. 1974J. Wainwright Evidence I shall Give xxxvii. 209 The on-off pulse of the lighthouse beam. 1976W. Greatorex Cassover 119 Over the roast lamb Amberley had made fun of Galina's on-off vegetarianism. |