随着气体流量的增加，产生气泡的时间间隔变短，气泡间聚并的位置逐渐向前推移，气泡的脱离时间先减小后增大；
With the gas flow flux increase, the time interval of bubble formation decreases, the bubble coalescence site moves forward, the detaching time decreases first and then increases.
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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