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- space polycyclic compound 立体多环化合物
- 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。
- Tell that joker to stop using my parking space. 叫那个家伙不要占用我的停车场。
- There is plenty of space here to move about. 这里有很大的活动空间。
- We're a bit cramped for space in this attic. 在这间阁楼里我们有点活动不开。
- There isn't much space left for your luggage. 剩下的地方不太够你放行李的。
- It's easier for small car to find a parking space. 小型汽车比较容易找到停车空地。
- The hotel has garage space for thirty cars. 这家饭店有停放30辆小汽车的车位。
- There isn't enough space for my address. 我写地址的地方不够。
- Space rockets are being sent up all the time. 现在随时都有火箭发射。
- Space your words when you write. 写字的时候要把字均匀地隔开。
- A missile was projected into space. 导弹被发射升空。
- Rockets have enabled space travel. 火箭已经于太空旅行成为可能的事。
- The story about space travelling is interesting. 那个关于宇宙旅行的故事很有趣。
- Depress the space bar on a typewriter. 按下打字机上的空格键
- polycyclic compound 多环化合物
- Distancesin space are quite mind-boggling. 宇宙之大令人吃惊。
