名词
中文翻译：聚焦杆
同义词：
['focusing rod', 'focusing wand', 'focusing stick']
例句：
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1. The scientistused a focusing rod to adjust the focus of his microscope.
科学家使用一个聚焦杆来调整显微镜的焦点。
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2. During the experiment, the teacher used a focusing rod to help the students understand the concept better.
在实验过程中，老师使用一个聚焦杆帮助学生更好地理解这个概念。
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3. The photographer used a focusing rod to capture the perfect shot of the sunset.
摄影师使用一个聚焦杆捕捉到了完美的日落景象。