词汇	Ringworld by.Niven
释义	Ringworld by.Niven. 录音书籍.
随便看	conventional oil conventional oil and gas conventional oil quenching conventional open hole packing method conventional open operation conventional operating current conventional operation conventional opinions conventional optical projection lithography conventional option conventional optometry conventional order conventional ordnance release computer conventional ordnance status system conventional organization conventional organizations conventional other conventional outlook on honesty conventional oven conventional ovens conventional packed column conventional packing conventional pane conventional panel conventional parameter