查询词典 intersection ring

We will see that a left morphic ring has many nice properties if it is simultaneously a reduced ring.

第二部分：主要研究了约化的左morphic环自身以及该环类上的模的性质。

Theorem 2.2.34 Let R be a reduced left morphic ring, then R is a left semi-hereditary ring.

定理2.2.34设R是约化的左morphic环，则R是左半遗传环。

Theorem 2.3.7 Let R be a reduced left morphic ring, then R is a right FS-ring.

定理2.3.7：设R是约化的左morphic环，则R是右FS-环。

Theorem 2.3.3 Let R be a reduced left morphic ring, then R is a right PS-ring.

定理2.3.3：设R是约化的左morphic环，则R是右PS-环。

If ring eRe and (1 - e)R(1 - e) are both left morphic rings, then R is also a left morphic ring.

如果eRe和(1-e)R(1-e)都是左morphic环，则R也是左morphic环。

Poly(ethylene-2,6,-naphthalate) is a newly developed polyester. The chemical structure of PEN can be described by replacing the benzene ring in poly with the stiffer naphthalene ring.

聚萘二甲酸乙二酯是一种近年来获得较大发展的高性能聚酯材料，其分子结构与聚对苯二甲酸乙二酯相类似，可看作是由PET链中苯环由刚性更大的萘环所替代的产物。

The conjugated rings affect the bioactivity most. Antitumor activity was greatly improved through changing the phenyl ring with a naphthyl ring.

下端共轭环对活性的影响最大，将下端的共轭环扩大的过程中，将苯环改为萘环，其活性提高了近一个数量级。

If the sapphire ring is for engagement then remember at some point the ring will be worn along side another so you do not want them to clash or for one to outstand the other.

如果蓝宝石戒指是接触，然后记得，在某一点上环会磨损沿另一侧所以你不希望他们发生冲突或一至凸现的。

Starting from 4-androstenedione, three novel 3-oxo-4-aza-5-androstene-17-oxime derivatives 7, 8 and 9 were synthesized through oxidation ring cleavage, amination ring closure, oximation,and substitution .

以4雄烯二酮为起始原料，经过氧化开环、氨解闭环、肟化、取代等4-步反应，合成了3个新的3-羰基-4-氮杂-5-雄甾烯-17肟衍生物7、8和9，并用质谱、1HNMR、13CNMR等测试手段对目标化合物的结构进行了表征

Androstenedione and dehydroepiandrosterone as a new steroid material attracts people's attention because of the shortage of diosgenin resource and successful synthesis of AD by degradation of sterols. The followings were included in this thesis: 1. 24 new oxime-ether and oxime-ester compounds from AD were synthesized by cleavage of A-ring through NaIO_4/KMnO_4 oxidation, ring closure by amination, oximation with hydroxylaminechloride in C-17 position.

甾体药物的合成原料一般为薯蓣皂素、剑麻皂素、番麻皂素等，随着薯蓣资源日渐枯竭，使得甾体药物工业不得不寻求新的原料，而微生物降解胆固醇和植物甾醇合成雄烯二酮获得成功，使得AD成为新兴的甾体原料吸引了人们的注意。

A strange and mysterious deep sea creature.

一种奇异、神秘的深海生物。

It's a yellow rectangle .

这是黄色的长方形。