noun🔗Share孔, 缝隙 An opening, gap, or hole, usually small and narrow"an aperture in a wall"墙上的一个小孔gapparttechnologydevicephysicsChat with AIVocabulary GamePractice Reading
noun🔗Share光圈，孔径。 Something which restricts the diameter of the light path through one plane in an optical system."The camera's aperture controlled how much light entered the lens, affecting the brightness of the photograph. "相机的光圈控制着进入镜头的光线量，从而影响照片的亮度。technologyphysicsdeviceChat with AIVocabulary GamePractice Reading
noun🔗Share光圈，孔径. 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."这架望远镜的物镜孔径是100厘米。astronomyphysicstechnologyscienceChat 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 satellite dish, with its large aperture, allowed the television station to receive a strong signal from the communication satellite. "那个卫星天线，由于有着巨大的天线孔径，使得电视台能够接收到来自通信卫星的强大信号。technologycommunicationelectronicsspaceastronomysignaldevicemachinesystemChat with AIVocabulary GamePractice Reading
noun🔗Share张角，孔径角 (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."如果母线与轴线成θ角，那么这个圆锥的张角就是2θ。mathtechnicalphysicsChat with AIVocabulary GamePractice Reading
