directional
🇬🇧/dəˈrekʃənl; daɪˈrekʃənl/ 🇺🇸/dəˈrekʃənlˌdaɪˈrekʃənl/📚 15797 21If something such as a radio antenna, microphone, or loudspeaker is directional, it works most effectively in one direction. (广播天线、麦克风或扬声器)定向型的
adjective [原级]方向的
Unless he was equipped with a directional microphone, he was out of earshot. 除非给他配备一个定向扬声器，否则谁也听不见他。
noun [具体名词]定向型的
Jets of compressed air gave the aircraft lateral and directional stability. 压缩气体喷流从侧面和正面稳定了机身。
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