单词 | fluorescent material |
例句 | DEFINITIVE EXAMPLES 权威例句〔black light〕Invisible ultraviolet or infrared radiation. Black light causes fluorescent materials to emit visible light and is used to take pictures in the dark.黑光:看不见的紫外线或红外线。黑光使荧光物体发出可见光,用于黑暗中拍照美国传统 |
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