焦点: 1.[数学] [物理学] (二次曲线焦点; 主焦点) focal point; focus 短语和例子虚焦点 virtual focus; 主焦点 principal focus; 焦点分散 defocus2.(问题的关键所在或争论的集中点) central issue; centre; point at issue 短语和例子斗争的焦点 the focus of the
Mm single focal point lens shutter cameras 镜头快门单焦点相机
2.
Measuring focus of lens quickly 单焦点镜片快速功能。
3.
Ophthalmic optics - uncut finished spectacle lenses - specifications for single - vision and multifocal lenses 眼科光学.未切边成品眼镜片.单焦点和多焦点镜片规范
4.
Ophthalmic optics - uncut finished spectacle lenses - part 1 : specifications for single - vision and multifocal lenses 眼科光学.未切边成品眼镜片.第1部分:单焦点和多焦点镜片规范
5.
Ophthalmic optics - uncut finished spectacle lenses - part 1 : specifications for single - vision and multifocal lenses iso 8980 - 1 : 2004 ; german version en iso 8980 - 1 : 2004 眼科光学.未切边成品眼镜片.第1部分:单焦点和多焦点
