a trench that is dug and roofed over as a shelter for troops
掩体,地下掩蔽部。
an underground air-raid or nuclear shelter
防空洞。
a low shelter at the side of a sports field, with seating from which a team's coaches and players not taking part can watch the game
(体育场边的)运动员席。
(亦作
独木舟。