syntax rule

In this paper , according to BNF , the language syntax rule is defined.

本文采用巴科斯范式(BNF)定义了CNC系统 中宏程序设计语言文法.

additionally, db2 requires that you follow a basic syntax rule in order to detect the potential application of a spatial predicate.

此外，DB2要求遵从基本的语法规则，以检测潜在的对空间谓词的使用。

if all conditions are met, including the simple syntax rule, it is still not ensured that a spatial grid index is used to satisfy the query.

如果所有条件都符合，同时也符合简单的语法规则，那么还不能保证可以使用空间网格索引来满足查询。

This pattern is often reapplied several times through a rule as you dig down through an abstract syntax tree.

在您沿着抽象语法树深入时，该模式通常会通过一条规则重复应用几次。

tense is not only a syntax rule, mostly, how to use it is decided by the whole context of discourse, and serves for communicational aims.

英语时态的使用不仅仅是一种句法规则，更多情况下选用哪一种时态取决于语篇的大环境，服务于语篇的交际目的。