sheath
[ʃi:θ] noun countable
■a close-fitting covering to protect something 鞘套；护套•The cable has a copper wire surrounded by a plastic sheath.电缆是铜丝做的，外面包着塑胶皮。 •The nerves are protected by thin sheaths of fatty tissue.神经由薄薄的脂肪鞘保护着。 ■a cover into which a knife or sword fits so that the blade cannot cut someone when it is not being used （刀剑的）鞘•He drew the knife from its jewelled leather sheath.他把刀从镶有珠宝的皮鞘中抽出来。 UK * a condom |