focuser聚焦放大镜,聚焦装置focusn.焦点；焦距；中心v.（使）集中；聚集focus on human being以人为本focus of convenience适用焦点focus one's study on集中精力研究…focusing pectrometer聚焦分光计focus-coil housing聚焦线圈壳focus in image space[化] 像方焦点; 第二焦点focus and difficulty重点和难点focusing pocketlight聚焦式袖珍手电(筒)focusing beamforming聚焦变换波束形成Focus on the learner大学英语