词汇	slavery ownership
释义	slavery ownership 奴隶制所有制
随便看	natural organic matter natural organic matters natural organic pigment natural organic polymer natural organic substance natural organic substances natural organohalogen compounds natural orifice natural origin natural original ecology natural ornamentadornment natural or synthetic raw materials natural or synthetic raw materials? natural orthogonal function expansion natural oscillation natural oscillation frequency natural oscillations natural oscillator natural outcome natural outcrop natural outdoor weathering test natural outflow natural outlook natural ovulation natural ox gallstone