| 释义 |
ˌbidiˈrectional, a.
[bi-2.]
Functioning in two directions; spec. of a microphone (see quot. 19621).
1941A. E. Craig Speech Arts (ed. 2) xxxix. 509 A bidirectional microphone, with the speech directed into either, or both, the openings or faces, is the kind deemed best for the production of radio plays. 1960Aerodrome Lighting (B.S.I.) 29 Light fittings..may be bi-directional or uni-directional according to whether they are to cover both directions of landing and take off or not. 1962A. Nisbett Technique Sound Studio 243 Bi-directional microphone, one which is live on the front face and back, but which is dead at the sides and above and below. 1962Simpson & Richards Junction Transistors xvi. 384 A bi⁓directional switch using four silicon junction diodes.
Hence ˌbidiˈrectionally adv.
1966Jrnl. Compar. Neurol. CXXVII. 71/1 The rate of flow may be as high as 30–70 mm per day, streaming bidirectionally. 1973Nature 26 Oct. 459/2 These findings are consistent with the Yin Yang hypothesis that the two cyclic nucleotides have opposing actions in bidirectionally controlled systems. 1984Freetime Autumn 49/2, I liked the versatility it offers: lots of features and the ability to print text bi-directionally. |