名词
中文翻译：透镜筒
同义词：
['lens barrel', 'lens tube', 'lens holder']
例句：
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1.The camera uses a lens cylinder to focus light onto the film.
相机使用透镜筒将光线聚焦到胶片上。
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2. The scientist used a lens cylinder to observe the object through a microscope.
科学家使用透镜筒通过显微镜观察物体。
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3.The lens cylinder is an essential part of the telescope, allowing it to focus light onto the eyepiece.
透镜筒是望远镜中不可或缺的部分，它允许光线聚焦到目镜上。