名词
中文翻译：镜头滑块
同义词：
['lens', 'lens slider', 'lens slider']
例句：
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1. The camera has a built-in lens slide for easy adjustment of the focus.
这台相机内置了镜头滑动装置，方便调整焦点。
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2. The lens slide was designed to make it easy for photographers to change lenses without removing the camerafrom their hands.
镜头滑动设计使得摄影师在不将相机从手中移开的情况下轻松更换镜头。
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3. When adjusting the focus, the lens slide is pushed forward until the desired image is in focus.
调整焦点时，镜头滑动向前推动直到图像清晰为止。