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[光][天]主焦点（等于focalpoint）
1、principal───n.ShouChang；校长；资本；当事人；adj.主要的；资本的
2、principal investigator───首席调查员；主要研究者
3、focus───vt.使集中；使聚焦；n.焦点；中心；清晰；焦距；n.(Focus)人名；(瑞典)福库斯；vi.集中；聚焦；调节焦距
4、central focus───主要焦点；中心焦点
5、principal office───总部，总社；总办事处；校长室；总店，总部，总社
6、sample focus───样本焦点
7、principal boy───n.哑剧男主角（常由女演员扮演）；哑剧中的男主角
8、principal components───主分量；主成分
9、focus today───关注今天
1、a major focus of the Bank's work, and it might well be the principal focus of the Bank 10 or 15 years from now.───世行工作的一项主要重点内容，而且很可能是今后10 - 15年中世行的一项首要重点内容。
2、Focal length is the distance between optical centre and principal focus.───焦距就是镜片中心和焦点之间的距离。
3、Eventually, he added other car companies to the suit, but Ford was the principal focus of his hatred.───后来，他又在诉讼中增加了其他几家汽车公司，但是福特公司是他的主要目标。
4、But the principal focus of attention is back on choices to be made closer to home.───但是，主要的注意力焦点回到了地区内有待做出的选择。
5、Focal length: The distance between the centre of a lens and its principal focus.───焦距：镜头中心与其主焦点的距离。
6、The British Sedimentological Research Group (BSRG) is the principal focus point for all aspects of sedimentological research in the UK.───英国沉积学研究组 (B S R G)是英国最主要的沉积学研究中心。
7、Why has poverty reduction, along with its health-related causes and consequences, become the principal focus of this commitment?───为何减贫工作及其与卫生有关的原因和后果成为这一承诺的主要焦点？
8、It's a major focus of the Bank's work, and it might well be the principal focus of the Bank 10 or 15 years from now.───清洁能源是世行工作的一项主要重点内容，而且很可能是今后10-15年中世行的一项首要重点内容。