a rough shelter made by digging a hole in the ground and covering it, used by soldiers 防空洞；地下掩体 a shelter by the side of a football (soccer) or baseball field where a team’s manager, etc. can sit and watch the game 球员席（足球或棒球场边供球队教练、候补队员等就座观赛） - (also dugout canoe)
a canoe (= type of light narrow boat) made by cutting out the inside of a tree trunk 独木舟