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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Our cumulative experience with arms control agreements nonetheless suggests that there is a powerful tendency within the intelligence community to find only ambiguity when reasonable clarity might entail undesirable repercussions.

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