Moreover, the length of alkyl groups in dialkylurea lead to different morphology of the aggregates.

烷基链长度不同，形成的纤维状聚集体的形态也不同。

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But in 1974 scientists found that the halogen-alkyl compound is the main factor of those can lead to the Ozone cavity.

但是，1974年科学家发现，卤代烷化合物是造成臭氧空洞形成的重要原因。

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But in 1974 scientists found that the halogen-alkyl compound is the main factor of those can lead to the Ozone cavity.

但是，1974年科学家发现，卤代烷化合物是造成臭氧空洞形成的重要原因。

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