单词	twofold symmetry
释义	twofold symmetry 双面对称
随便看	three-phase Y connection three-phase y-connection three-phase y-load Three-phase Z-source inverter three phasor three-phaso symmetry electrical source three phenomena three-phonon state three-photon three-photon absorbing three-photon absorption three-photon annihilation three-photon correlated imaging three-photon decay Three-photon fluorescence three-photon induced lasing three-photon ionization three photon processes three photon resonant ionization three-piece dress three piece flare fitting three-piece flare fitting three piece flat base rim three-piece hoisting threepiece injection mold