相关单词近义词 proxy 代理人, replacement 更换, deputy 代表, alternate 交替, substitute 代用品, stand-in 替身, backup 后备, acting 演戏, understudy 充当（某角色的）候补演员..., satellite 卫星；人造卫星..., lieutenant 中尉, option 选择权, representative 代表, second 第二的, foster 领养临近词surround, surrey, Surrogate son, surrogate mom, surrogateship, surrogate key, surrogate wife, surrogate home, surrogate keys, surrogate data, Surrogates ., surrogate birth 返回 surrogating