focuser聚焦放大镜,聚焦装置
focusn.焦点;焦距;中心v.(使)集中;聚集
focusing regulator聚焦调节器
focused collimator聚焦型准直器
focusing electrode聚焦电极
focus ... on使眼睛注视, 集中
focusing alignment聚焦调整
focusing collector聚焦型收集器
focus of narration叙事聚焦
focusing schlieren聚焦纹影
focus range switch聚焦范围开关
focus-on-forms纯形式教学法