two coreadj.双磁心的(双活性区的)twonum.二；两个two roundness bracing system双环形内支撑two-tier gold price system双重金价制two-dimensional complexity二维复杂度Two times two equals four.二乘二等于四。two-line early hybrid rice两系杂交早稻two kinds of herbal medicine二味中草药two-dimensional conduction二维热传导Two separated tunnel linings分离式双拱隧道衬砌two-dimensional photometry二维测光two-chamber brake cylinder气制动双腔分泵