标记，特征位具有两种稳定状态的一位或一系列位，在软件中表明单一信息 A bit or series of bits with two stable states, used in software to indicate a single piece of information.
方括弧，中括号符号之一，用于托住一手写或印刷或标明被视作单一数量单位的数字表达式 One of a pair of marks, [ ], used to enclose written or printed material or to indicate a mathematical expression considered in some sense a single quantity.
颤动单一的完整摆动；抖动 A single complete vibrating motion; a quiver.
执行命令由单一指令而引起的操作 An action resulting from a single instruction.