单词	directional
释义	directionaldi‧rec‧tion‧al /dəˈrekʃənəl, daɪ-/ adjective technical Examples EXAMPLES FROM OTHER DICTIONARIES directional signs a directional antenna EXAMPLES FROM THE CORPUS Hooking up a powered antenna by Terk, which amplifies incoming signals and allows greater directional fine-tuning, produced no appreciable improvement. It was several preceptors phasing out together, Posi later explained, that threw directional control and some other functions out of kilter. Note that both the l.e.d. and phototransistor are very directional - the tops are the sensitive surfaces. So, says Daedalus. imagine a Cexspex lens exposed to a bright directional beam of light. word sets WORD SETS► Communications amplitude, nounAV, beam, verbcall letters, nouncall sign, nounconsole, nouncopier, nouncopyright, nouncoverage, nouncryptography, nouncuneiform, adjectivecypher, noundigital, adjectivedigitize, verbdirectional, adjectivedisinformation, noundisquisition, noundisseminate, verbdocument, verbedit, verbeditor, nounelectronic mail, nounemail, nounfax, nounfax, verbfibre optics, nounfrequency, nounindex, nouninformation science, nouninformation technology, nounintercom, nounloudhailer, nounloudspeaker, nounmedia, nounmedia studies, nounmedium, nounmicrofilm, nounmonitor, nounmultimedia, adjectivenetwork, nounnetwork, verbnews conference, nounnewsreel, nounnonverbal, adjectiveopinion-makers, nounoptical fibre, nounover, adverboverhead, nounoverhead projector, nounPA, nounpage, verbpager, nounpalimpsest, nounpapyrus, nounpenmanship, nounradio beacon, nounradio-cassette player, nounradiogram, nounrecord, nounreissue, verbreportage, nounscramble, verbsemaphore, nounsmoke signal, nounsound wave, nounsurfing, nounTannoy, nountelecommunications, nountransceiver, nountransponder, nounvideo conferencing, nounVideotex, nounvoice print, nounwalkie-talkie, noun 1relating to the direction in which something is pointing or moving2a directional piece of equipment receives or gives out radio signals from some directions more strongly than others
随便看	declining declutter decode decoder decolonization decolonize decommission decompose decomposition decompress decompression decompression chamber decompression sickness decongestant deconstruct deconstruction decontaminate decontamination decor decorate decorating decoration decorative decoratively decorator

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