空符号是相对于有声有色有定形的实符号而言。
The empty sign is opposite to the vivid, real, fix-formed sign.
空符号存在于任何维度的符号系统和任何符号活动过程中。
The writer think that the empty sign lies in any sign system of dimension and in any process of sign activity.
条码是一组按一定编码规则排列的条、空符号组合，用以表示一定的字符、数字及符号组成的信息。
Bar code is one kind of sign composed regularly with a group of bars and Spaces, which is used to represent the combination information of characters, Numbers and symbols.
所谓空符号，是指以空白、间隔、停顿、距离等作为符号形式，在各种符号系统中起着不可替代作用的一类特殊符号。
So-called empty sign means the symbol with the form of blank, partition, pause and distance etc. functioning as a special sign that can't be acted for in various sign systems.
对于文件的硬链接或符号链接的情况，此api将检查原始文件是否为空。
In case of hard or symbolic links to a file, this API checks whether the original file is empty.
所以首先要使用[：]符号创建一个空映射。
如果解析后的上下文变量内容为空，则不会发生替换，并且变量名称在查询字符串中保持不变(包括“%”符号)。
If the resolved context variable content is null, no replacement occurs and the variable name remains unchanged in the query string (including the "%" signs).
VTL支持一种静态引用符号，以避免呈现不存在的或者空的引用。
VTL supports a quiet reference notation to avoid rendering nonexistent or null references.
d或——delete：从目标目录删除应用程序的符号链接，也就是卸空(unstow)应用程序。
D or — delete: Deletes application's symlinks from the target directory, i.e. unstows application.
空段落不能应用首字下沉格式，您必须先至少键入一个字母、数字或符号。
You cannot apply drop cap formatting to an empty paragraph. You must first type at least one letter, number, or symbol.
针对瑞利衰落信道中突发模式的空时网格编码的多电平连续相位调制(STTC - MCPM)系统，提出了一种基于数据辅助的符号定时估计算法。
A data aided symbol timing estimation algorithm was proposed for burst-mode space-time trellis coded multi-level continuous phase modulation (STTC-MCPM) systems in Rayleigh fading channels.
针对瑞利衰落信道中突发模式的空时网格编码的多电平连续相位调制(STTC - MCPM)系统，提出了一种基于数据辅助的符号定时估计算法。
A data aided symbol timing estimation algorithm was proposed for burst-mode space-time trellis coded multi-level continuous phase modulation (STTC-MCPM) systems in Rayleigh fading channels.
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