Optional blocks can also be nested, in which case the inner optional block is only considered when the outer optional block's pattern matches the graph.
可选块也可以嵌套，在这种情况下，只有外部可选块的模式与图形匹配时，才考虑内部可选块。
When an error occurs within a nested TRY block, program control is transferred to the CATCH block that is associated with the nested TRY block.
当嵌套的TRY块中出现错误时，程序控制将传递到与嵌套的TRY块关联的CATCH块。
In order to solve the difficulty of nested structure of SQL, the idea of query block is introduced and the algorithm of changing query block to SQL is realized.
为了解决嵌套结构转换的难点，引进了查询块的概念，实现了查询块向SQL语句转换的算法，并将此转换方法与以前的方法进行了比较。
By organizing data block partition, two layer nested bintree were built.
在数据分块组织的基础上构建了两层嵌套二叉树。
If the float is nested inside the second block box, and that container box has no borders or padding, it appears just the same as when the float is between the block boxes.
如果浮动被嵌套在第二个块盒中，并且该容器盒没有边框盒填充，浮动呈现样式，与浮动被放置在块盒之间是相同的。
Block statements reduce the ambiguity that often arises when control constructs are nested, and they provide a mechanism for organizing the code for improved readability.
块语句减少了当控制结构嵌套时候可能引起的混淆，提供了一种提高代码可读性的组织机制。
Block statements reduce the ambiguity that often arises when control constructs are nested, and they provide a mechanism for organizing the code for improved readability.
块语句减少了当控制结构嵌套时候可能引起的混淆，提供了一种提高代码可读性的组织机制。
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