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- More work is needed to uncover whether such a core exists or whether the polycyclic compounds result from the drastic treatments. 为了揭开这样一种芳核是否存在，或者多环化合物是不是由于剧烈处理所引起的问题，必须进行大量的工作。
- On the basis of the helix theory proposed by the authors,the relationship between stereostructure and rotatory direction is analyzed for the fused polycyclic compounds. 通过笔者提出的螺旋理论,分析了多环稠合化合物的立体结构和旋光方向间的关系。
- This Paper introduces the methods to judge the aromaticity,non-aromaticity,antiaromaticity,homoaromaticity and antihomoaromaticity of polycyclic compounds and their applications in organic chemistry. 介绍了简单判断多环化合物的芳香性、非芳香性、反芳香性、同芳香性及反同芳香性的方法及其在有机化学中的应用。
- The results showed that there were 36 to 131 sorts of benzene and its derivatives, heterocyclic compounds, and polycyclic compounds being detected.Most of them have harmful effect on human health. 分析结果表明,这些香烟中,含有苯类衍生物、杂环类化合物及多环化合物等,从36种到131种不等,绝大多数有害人体健康。
- Oxygen enters into many compound bodies. 氧是许多化合物的组成部分。
- Air is a mixture, not a compound of gases. 空气是气体的混合物，不是化合物。
- Rose is a plant with compound leaves. 玫瑰是复叶植物。
- "Broad-shouldered" is a compound word. "Broad-shouldered"是个复合字。
- Common salt is a compound of sodium and chlorine. 食盐是钠和氯的化合物。
- My friend's family lives in the compound. 我朋友的家住在那个大院里。
- A chemical compound consisting of such molecules. 二聚化合物这种聚合物形成化合物
- space polycyclic compound 立体多环化合物
- polycyclic compound 多环化合物
- An organic compound containing many double bonds. 多烯一种包含许多双键的有机化合物
- Keywords helix theory;optical activity;configuration;fused polycyclic compounds; 螺旋理论;旋光性;构型;多环稠合化合物;
- A medicinal compound formerly used as an antidote for poison. 解毒剂一种药物复合剂，以前用于解毒
- All prisoners were frog-marched (out) into the compound. 犯人都被迫反剪双臂(出来)进入院子。
- A radioactive compound used in radiotherapy or diagnosis. 放射性药剂一种用于放射性治疗或诊断的放射性化合物
- Decomposition or transformation of a compound caused by heat. 热解化用，高温分解由于热量而导致的化合物的分解或转化
- The iron in the chemical compound must be purged. 化学混合物中的铁必须清除。
