twofoldadj.两倍的;双重的
twofold frequency system双频制
twofold axis of symmetry二重对称轴
twofold spatial degeneracy二重空间简并度
twofold character of labor劳动的二重性
twofold spacial degeneracy二重空间简并度
twofold operation mechanism双重运行机制
Twofold Lactose Bile Salt Medium双料乳糖胆盐培养基经
twofold combustion control system两级燃烧控制系统