名词
中文翻译：结合焦距同义词
同义词：
['combinedfocal point', 'combined focal length']
例句：
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1. The camera has a combinedfocal length of 50mm.
这台相机的焦距为50mm。
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2.The lens is designed to have a combinedfocal length of 85mm.
镜头设计成总焦距为85mm。
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3.The combination of these two lenses provides acombined focal length of 135mm.
这两个镜头的组合提供了总焦距为135mm的效果。