abbr. 后台智能传输服务（Background Intelligent Transfer Service）；建设集成时序供应（Building Integrated Timing Supply）；二进制数字（Binary digits）

n a small piece or quantity of something

n a small fragment of something broken off from the whole

n an indefinitely short time

n an instance of some kind

n piece of metal held in horse's mouth by reins and used to control the horse while riding

n a unit of measurement of information (from binary + digit); the amount of information in a system having two equiprobable states

n a small amount of solid food; a mouthful

n a small fragment

n a short theatrical performance that is part of a longer program

n the part of a key that enters a lock and lifts the tumblers

n the cutting part of a drill; usually pointed and threaded and is replaceable in a brace or bitstock or drill press