质量概念和质量管理理论随着质量环境的变迁，始终处在演化过程之中。
The concept of quality and quality management theory is always in evolutionary process along with transition of environment.
质量概念和质量管理理论随着质量环境的变迁，始终处在演化过程之中。
The concept of quality and quality management theory is always in evolutionary process along with transition of environment.
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