❶ 焦点❷ 焦距❸ 对焦点，聚焦〔He brought the camera into focus．他把照像机对好焦距。
〕 ❹ (活动或兴趣的)中心，集中点〔The baby was a focus of attention．这个婴儿是人们注意的焦点。〕‖ v．❶ 聚焦；使聚焦〔to focus light rays对光〕 ❷ 调节焦距，使看清〔Glasses help him to focus his eyes on small print．戴眼镜有助于他看清小印刷字体。
〕 ❸ 集中〔He couldn’t focus his attention on his homework．他不能将注意力集中到家庭作业上来。〕／in focus清晰，清楚／out of focus模糊不清／focuses，foci［复］