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单词 the Doppler effect
释义

the Doppler effect

noun
/ðə ˈdɒplər ɪfekt/
/ðə ˈdɑːplər ɪfekt/
[singular] (physics)
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  1. the way that sound waves, light waves, etc. change in frequency depending on the direction that the source is moving in relative to the person who is observing
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更新时间:2024/11/10 15:01:54