名词
中文翻译：Unknown
同义词：
['camera lever', 'camera handle', 'shutter lever', 'shutter handle']
例句：
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1. The photographer used a cam lever to adjust the focus.
摄影师使用相机杠杆调整焦点。
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2. The camera was heavy and cumbersome, but the cam lever made it easy to operate.
相机很重且笨重，但是相机杠杆让操作变得容易。
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3. The photographer had to use the cam lever to open the door before taking the picture.
摄影师必须使用相机杠杆打开门才能拍照。