单词	烯炔[类]
释义	烯炔[类]enyne
随便看	three fold three-fold threefold threefold axis threefold axis of symmetry three fold block threefold branch point three-fold coincidence three-fold--coincidence threefold coincidence threefold coordination three-fold cord threefold cord three-fold degeneracy three-fold--degeneracy threefold degeneracy three-fold division threefold division three folded twist threefoldness three-fold purchase three-fold purchase; treble purchase threefold representation three-fold rope threefold rotatory inverter