Theoretical value was the theoretical amount of the sulfuric acid reacting with alkali metal like lithium, sodium, potassium in ore.
理论值即硫酸与矿石中锂、钠、钾等碱金属反应生成相应的硫酸盐的理论用量。
A quantitative value representing the subjective rating or opinion of users reacting to seeing or using a system, as opposed to performance measures like task completion time or number of errors.
它是一个定量值，表明了用户观看或使用一个系统的主观评价和意见，不必要象绩效测量那样以任务完成所需的时间和错误数为指标。
A quantitative value representing the subjective rating or opinion of users reacting to seeing or using a system, as opposed to performance measures like task completion time or number of errors.
它是一个定量值，表明了用户观看或使用一个系统的主观评价和意见，不必要象绩效测量那样以任务完成所需的时间和错误数为指标。
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