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。

youdao

First, when the search index is created, taxonomy categories are applied to documents based on whether a document satisfies the rule.

首先，在创建搜索索引时，根据文档是否满足规则，将分类法目录应用于文档。

youdao

Here's the rule to follow: count the number of left parentheses from the beginning of the regex - the count is the index to the match array.

下面是需要遵循的规则：从regex的开头开始计算左括号的数目——该计数是匹配数组的索引。

youdao

The rule suggests trouble: the index has fallen at an annual rate of more than 2% in the past six months.

ECONOMIST: Leading economic indicators

Actually, the historical performance of Athens General Exchange Index confirms this rule.

FORBES: Four Flavorful Tastes Of Greece To Ride The Rebound

The index evaluates economic freedom by looking at the rule of law, regulatory efficiency, the size of government and open markets.

BBC: Hong Kong retains top spot of world's freest economy