作者在此要感谢IBM多伦多实验室的两位软件开发分析师ying zhao与leying Zhu，感谢他们审阅了这篇文章。

The author wishes to thank ying Zhao and Leying Zhu, Software Development Analysts, IBM Toronto Lab, for reviewing this article.

youdao

作者真诚感谢IBM多伦多实验室的软件开发人员Christophe Elek对本文的审阅。

The authors would like to thank Christophe Elek, Software Developer, IBM Toronto Lab, for reviewing this article.

youdao

YACC是美国贝尔实验室的软件产品，是UNIX操作系统下的软件开发工具之一，也可在非UNIX环境下运行。

YACC(Yet another compiler -compiler), developed by Bell Lab, is a important software with UNIX, and can run on some other OS.

youdao