trigonal dipyramidal class三方: trilateral; three sides; tri ...双锥: bipyramid复三方双锥类: ditrigonal dipyramidal class; ditrigonaldipyramidalcla六方双锥类: hexagonal dipyramidal class; hexagonaldipyramidalcla复六方双锥类: dihexagonal dipyramidal class; dihexagonaldipyramidalcla下载手机词典可随时随地查词查翻译