【建】 aromatic cyclodehydration
fragrant; good; virtuous
a group of things with common features; clan; family; race; strain
【化】 alkaline earths; family; group; odd series; periodic family; sub-group
subgroup
【医】 group; race; series; tribe
【化】 annelation; annulation; intramolecular condensation
【化】 dehydrogenation