爱词霸英语   汉语   手机版   软件版下载 | English
每日一句:正在加载...
1.A usually adjustable opening in an optical instrument, such as a camera or a telescope, that limits the amount of light passing through a lens or onto a mirror.
光圈光学仪器上的一个可调开口,如照相机或望远镜,它控制穿过镜头的或到镜面的光的数量收藏指正
尝试查询