单词	mephton
释义	mephton Vitamin K1
随便看	optional sign optional signed constant optional singulary transformation optional sleep optional snacks optional solution optional sports teaching optional stipulation optional stop optionalstop instruction optional stop instruction optional-stop instruction optional stop order optional stowage clause optional string optional studies optional subject optional subjects optional subjects at school optional subscription-time selectable service Optional subs cription-time selectable service optional succession optional suppression optional surcharge optional switch