Unmanned post offices meant millions of letters went unsorted.邮局无人工作意味着许多信件无人分拣。an unmanned Mars mission无人火星探测Scientists say these unmanned flights can make important and exciting discoveries.科学家们说这次无人驾驶的太空飞行能够获得令人兴奋的重大发...
Luge athletes race by lying on their backs on sleds with steel runners.小型撬运动员把他们的背靠在雪橇上通过冰刀来滑行比赛.She was left lying on her side and her clothes were in disarray...发现她时她侧躺着，且衣衫不整。I suspected all along that he was lying.我始...