名词
中文翻译：电磁枪
同义词：
['electron gun', 'electron beam tube', 'electronic cathode-ray tube']
例句：
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1. The scientist used an electromagnetic cathode-ray tube to observe the reaction.
科学家使用了一个电磁枪来观察这个反应。
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2. The new electronic cathode-ray tube is more powerful and has a longer lifespan.
新型的电子枪管更强大，使用寿命更长。
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3. The teacher demonstrated how to operate an electromagnetic cathode-ray tube using a projector.
老师演示了如何使用投影仪操作电磁枪。