eight member ring heterocyclic compound [有化] 八元杂环化合物
four member ring heterocyclic compound [有化] 四元杂环化合物
FIVE MEMBER RING HETEROCYCLIC COMPOUNDS 五员杂环化合物
member ring 元环
six-member-ring 六元环
four-member ring 四元环
five member ring 五元环的
four member ring 四元环
member ring systems 多环体系
The spy ring had a fifth member as yet still undetected.
特务团伙的第五名成员仍未被发现。
Its molecular structure is made up of a five member, unsaturated lactone ring with two hydroxyl groups.
其分子结构是由五个成员国，不饱和内酯环两个羟基。
The rotor structure of claim 1, further comprising rotor head means including a ring bearing member for said rotor structure.
转子结构索赔1 ，进一步组成的转子头途径，包括一环轴承成员说，转子结构。
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