The experimental study on the relationship between annulus pressure differential, interlayer differential and cementing quality is carried out on the lab simulation test unit.

室内利用模拟试验装置进行了环空压差和层间压差与固井质量的关系的试验研究。

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So it's got an internal procedure,internal function, local to the unit test, that runs the simulation.

它有内部过程，内部函数，它对unit，test来说是有本地环境，来支持股票仿真程序的运行。

麻省理工公开课 - 计算机科学及编程导论课程节选