With use case-driven development, each test level USES a different grouping of artifacts, which AIDS in keeping the test within the appropriate boundaries for the phase.
有了用例驱动开发，每个测试水平使用工件的不同分组，从而有助于使测试保持在这个阶段适当的范围内。
The wide development strata overlap belt of different period and different level provided passage for petroleum migration, created beneficial reservoir conditions for strata reservoir formation.
不同时期、不同级别的地层超覆带的广泛发育为油气运移提供了通道，也为地层油气藏的形成创造了有利的圈闭条件。
Gains the medicine information way in view of different level doctor to try to make the analysis, new trend will serve which for the hospital library future development effective information need.
针对不同层次的医师获取医学信息的途径试做分析，为医院图书馆的未来开展有效的信息需求服务的新动向。
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