“Twofold labour”的意思、由来-开放百科全书

词条	Twofold labour
释义	SeeAbstract labour and concrete labour
随便看	List of British rail accidents by death toll List of British Rail Class 52 locomotives List of British Rail Class 87 locomotives List of British Rail TOPS depot codes List of British Railways shed codes List of British Railways steam locomotives as of 1967-12-31 List of British Railways steam locomotives as of 31 December 1967 List of British recording studios List of British records in finswimming List of British records in swimming List of British reptiles List of British Residents of Perak List of British Royal residences List of British Royal Residences List of British rulers by longevity List of British scientists List of British singles finalists at Grand Slam tennis tournaments List of British sport shooters List of British stand-up comedians List of British Swimming Championships champions List of British television channels List of British television programs List of British television series List of British television series remade for the U.S. market List of British television series remade for the U S market

开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。