directional 

  1. 形容詞
方向的, 指向性的
無線電: 指向的, 定向的

    
                        
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例句

                

                    
    
                                                    
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                                I will call those contexts directional contexts.                            
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                                The proximity effect on a directional microphone.                            
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                                Banners and directional signs have already been posted.                            
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                                LED lamps often have directional light characteristics.                            
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                                The biggest problem over the years has been directional .                            
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