名词
中文翻译：密度波理论
同义词：
['density wave theory', 'density wave theory例句：1. The density-wave theory suggests that the universe is expanding.（密度波理论表明宇宙正在膨胀。）2. The researchers proposed a new density-wave theory to explain the phenomenon.（研究人员提出了一个新的密度波理论来解释这一现象。）3. The theory has been tested and confirmed by numerous experiments.（这个理论已经被无数的实验所验证。）']
例句：
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1. The density-wave theory suggests that the universe is expanding.
密度波理论表明宇宙正在膨胀。
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2. The researchers proposed a new density-wave theory to explain the phenomenon.
研究人员提出了一个新的密度波理论来解释这一现象。
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3. The theory has been tested and confirmed by numerous experiments.
这个理论已经被无数的实验所验证。