focusn.焦点;焦距;中心v.(使)集中;聚集
focus plane焦平面
focus drive集中驱动
Focus groupn.焦点小组;中心小组
focused ray聚焦光线
focuscenter焦心点
focus exact正焦点, 准确焦点
focus servo聚焦伺服
focus glass调焦玻璃
focused jet聚向射流
focus level焦点水平,聚焦程度