在稠环和桥环化合物中，两个碳原子是两个环公用的。
In fused-ring and bridged-ring compounds two carbons are common to the two rings.
本文合成了七个硫三碳菁。其中四个具有桥环的菁染料。
Seven thiatricarbocyanine dyes in which four are with bridge chain were synthesized. Among them three compounds are first reported.
由带特殊张力的桥环双键可以得到规整的乙烯类加成聚合物。
Regular vinyl addition polymers may be obtained from particularly strained endocyclic double bonds.
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