twopennyadj.两便士的；不足道的；低廉的n.从前的一种啤酒；头twonum.二；两个two-dimensional image principal component analysis二维广义主成分分析two-dimensional discreteness small wave conversion二维离散小波变换Two-dimensional unconditionally stable FDTD method二维无条件稳定时域有限差分方法two-dimensional silicon micro-machined gyroscope二维硅微机械陀螺two-dimensional Tsallis-Havrda-Charvat entropy二维Tsallis-Havrda-Charvat熵Two dimensional liquid chromatographic fractionation二维液相色谱分离Two dimensional liquid chromatographic fracfionation二维液相色谱分离Two-dimensional polyareylamide gel electrophoresis双向电泳two-joint-segment transmission shafts automobiles汽车双联传动轴two-dimensional direction-of-arrival estimation二维DOA估计