noun🔗Share孔，缝隙，小洞。 An opening, gap, or hole, usually small and narrow"an aperture in a wall"墙上的一个小孔partgaparchitecturespacetechnicalChat with AIVocabulary GamePractice Reading
noun🔗Share光阑，孔径。 Something which restricts the diameter of the light path through one plane in an optical system."The camera's different apertures control how much light reaches the sensor, affecting the brightness and depth of field in the picture. "相机的不同光阑/孔径控制着到达感光元件的光线多少，从而影响照片的亮度和景深。physicstechnologydevicescienceChat with AIVocabulary GamePractice Reading
noun🔗Share孔径，光圈口径。 The diameter of the aperture (in the sense above) which restricts the width of the light path through the whole system. For a telescope, this is the diameter of the objective lens."This telescope has a 100cm aperture."这架望远镜的孔径是100厘米。physicsastronomytechnicalsciencedevicesystemChat with AIVocabulary GamePractice Reading
noun🔗Share天线孔径，孔径 (communications) The (typically) large-diameter antenna used for receiving and transmitting radio frequency energy containing the data used in communication satellites, especially in the geostationary belt. For a comsat, this is typically a large reflective dish antenna; sometimes called an array."The communication satellite used for the global television broadcasts has large apertures to receive and transmit signals clearly. "用于全球电视广播的通信卫星配备了大型天线孔径，以清晰地接收和发射信号。technologycommunicationelectronicsspaceastronomysignaldevicemachineenergyphysicsChat with AIVocabulary GamePractice Reading
noun🔗Share锥孔角，孔径。 (of a right circular cone) The maximum angle between the two generatrices."If the generatrix makes an angle θ to the axis, then the aperture is 2θ."如果母线与轴线的夹角是θ，那么锥孔角就是2θ。mathChat with AIVocabulary GamePractice Reading
