注意，已为每个副本组创建了一个公共表表达式(第2、18和38行)。

Notice that for each repetition group a common table expression has been created (lines 2, 18 and 38).

youdao

注意，已为每个副本组创建了一个公共表表达式(第2、18和38行)。

Notice that for each repetition group a common table expression has been created (lines 2, 18 and 38).

youdao