Cholesterol abundant in the nature and simple aromatic derivative can be made into gel precursor just through simple synthesis.
从自然界含量丰富的胆固醇和简单芳香衍生物出发，经过简单的合成即可得到凝胶的前体。
The aromatic oil is a mysterious present from nature.
芳香油是一种神秘礼物性质。
The polycyclic aromatic sulfur heterocycles (PASH) in the environment is characteristic as the stable nature, not easy to be degraded, strong toxic and potential danger.
有机含硫芳烃化合物（PASH） 性质稳定，不易降解， 毒性极强，具有潜在的危害特征。
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