名词
中文翻译：气体投影
同义词：
['gas projection', 'gas projections']
例句：
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1. The scientist used a gas projection to study the effects of air pollution on the environment.
科学家使用气体投影来研究空气污染对环境的影响。
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2. The projector was designed to produce gas projections for educational purposes.
投影仪被设计用来产生气体投影，用于教育目的。
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3. The gas projections were so bright that they could be seen from a distance.
这些气体投影非常明亮，可以从远处看到。