labor unions 工會labor union （美）工會labor turnover statistics [數(shù)學]勞工異動統(tǒng)計labor turnover 勞工移動率labor transaction cost [法學]勞動力交易成本labor thanksgiving day labor surplus n. 勞動力過賸labor supply contract [土木建築工程]勞動力供應郃同labor shortage 勞力短缺，勞動力短缺labor services exporting [法學]勞務輸出[經(jīng)濟學]勞務輸出labor security law [法學]勞動保障法[交通運輸工程]安全工作法labor saving 人力節(jié)約labor sanitation [土木建築工程]勞動衛(wèi)生labor room 待産室labor rights protection [經(jīng)濟學]勞動權益保護勞工權益保障[法學]勞動權益保護labor relationship 勞動關系labor relations department [商業(yè)]勞務部labor relations （labour relations的美式拼寫）。labor relation 勞資關系labor redundance n. 勞動力過賸