Therefore, NGC cannot guarantee that Coins with additive features will retain their full mint-applied aspects or their assigned grade.
因此，NGC不能保证附有添加物的钱币将保有其铸币所附的所有特质或其原有的评级状况。
It introduced that calcium-based sulfur-fixing agent and additive had effect on the sulfur-fixing, which was analyzed from two aspects of sulfur-fixing's thermodynamics and kinetics.
介绍了钙系固硫剂、添加剂对固硫的影响，并从固硫热力学和动力学两方面进行分析。
It introduced that calcium-based sulfur-fixing agent and additive had effect on the sulfur-fixing, which was analyzed from two aspects of sulfur-fixing's thermodynamics and kinetics.
介绍了钙系固硫剂、添加剂对固硫的影响，并从固硫热力学和动力学两方面进行分析。
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