Through the analysing of mechanism of breaking rock in a hole explosion, the principle and design method of a crushing blasting is expounded.

通过对炮孔爆破的破岩机理分析，论述了挤压爆破的原理；

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Finally, cryptanalysis advances can render any cryptographic mechanism or algorithm insecure as novel methods of breaking them are discovered.

最后，密码分析学的进步可以使任何加密机制或算法变得不再安全，因为总是有新奇的破解方法被找出来。

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This program keeps track of where to do page breaks, therefore it is worthwhile to prove that the page-breaking mechanism works.

这个程序会保持在何处分页的追踪，因此，有必要证明分页机制有效。

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