twofacedadj.两面派的twonum.二；两个two-dimensional electrode二维电极two-cylinder steam engine双汽缸蒸汽机two-row elevator-digger双行挖掘升运器two-dimensional stability二维稳定性two-kidney and one-clip两肾一夹Two-step A/D converter两步式A／D转换器two thousand and sixty four(=2064) 二千零六十四two-dimensional transform二维变换two-fold-classification双重分类two-photon polymerization双光子光聚合