n.幼儿床；吊床
n.小屋；村舍；棚；护套；鞘
abbr.[数]余切(=cotangent)
A hanging, easily swung cot or lounge of canvas or heavy netting suspended between two trees or other supports. 吊床一种易摆动的吊床或躺椅，用帆布或厚网挂在两树或别的支撑物之间
