词汇	mute on
释义	mute on 对…缄默
随便看	single-user operating environment single user operating system single-user operating system single-user operation singleuser/single task single user state single user system single-user system single user trunk single user UNIX single user wharf single use sterile syringe single use syringe single-use syringe single utility program single U-training single U tube single vacancy single vacation single vacation queue single vacations single vaccine single valency bond single-valued mapping single-valued meromorphic function