他们正在研究狼在数量上的变化。
这一人口变化带来的结果是，60岁以上的人在数量和比例上持续增加。
This demographic change has resulted in increasing Numbers and proportions of people who are over 60.
此外，将需要讨论的各种因素决定价格的变化在数量上的需求和变化的个人电脑的需求。
Also, there will be need to discuss the various factors determining prices in relation to change in quantity demanded and change in demand of personal computers.
河南省的耕地资源在数量上不断下降，经历了一个先减少后稍有增加并趋于平缓的变化态势。研究认为，耕地资源的空间转移并没有引起相一致的粮食生产质心的转移。
The quantity changes of the cropland of Henan Province tended to an equilibrium situation after experienced a reduce and ascend process by analyzing the statistics data in recent 20 years.
河南省的耕地资源在数量上不断下降，经历了一个先减少后稍有增加并趋于平缓的变化态势。研究认为，耕地资源的空间转移并没有引起相一致的粮食生产质心的转移。
The quantity changes of the cropland of Henan Province tended to an equilibrium situation after experienced a reduce and ascend process by analyzing the statistics data in recent 20 years.
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