研究了微可压缩流体在斜井内的不稳定流动状态，给出了数学模型，推导出了油井的完善程度和油井倾斜造成的表皮因子的计算式。
This paper analyzes the unsteady-state flow of a slightly compressible fluid into a slanted well and gives an equation for calculating the partial penetration and slanting of a well.
这种转移是不稳定的，回流性较强，因此，中国农村劳动力大多处于流动状态，而不是向城市较稳定的转移。
This kind of migration is unsteady and the reflux is stronger. Therefore, Chinese rural labor forces are in a floating condition instead of transferring stably toward the city.
在不稳定的流动状态下，气体的径向浓度分布曲线两边出现不对称。
In the unstable flow the radial distribution of tracer gas concentration is asymmetry.
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