名词
中文翻译：扩散速度
同义词：
['dissemination velocity', 'propagation velocity例句：1. The spread of the disease is very rapid.（这种疾病的传播非常迅速。）']
例句：
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1. The spread of the disease is very rapid.
这种疾病的传播非常迅速。
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2.The team needs to improve their spread velocity to compete better.
该团队需要提高其扩散速度以更好地竞争。
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3. The research shows that the spread velocity of the virus is increasing.
研究表明，病毒的扩散速度正在增加。