The rational well spacing under certain perforating level and the rational open thickness under certain well density can be determined by this equation.

用此关系式可确定该类油藏给定打开程度下的合理井距及给定井网密度下油井的合理打开厚度。

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When the well reaches a pool, oil usually rises up the well because of its density difference with water beneath it or because of the pressure of expanding gas trapped above it.

当井和一个水池相接时，油通常会从井里上升，因为它与井下的水的密度不同，或者因为停留在它上方的膨胀气体的压力。

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Cell chloroplast density and higher granum lamellae decreased as well. 

叶绿体高基粒片层逐渐减小。

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It boasts the industry's highest density as well as the highest performance level of 400 megabits-per-second (mbps) data transfer rate based on the toggle DDR 2.0 interface.

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Simple math shows that a marginal gas or oil well has a power density at least 22 times that of a wind turbine while a nuclear power plant has a power density that is more than 8 times that of a solar photovoltaic facility.

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The medicine worked incredibly well, lowering low-density lipoprotein (LDL), the bad cholesterol, by 70%.

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