In the Mesozoic petroleum system in Yanqi basin, the Badaowan Formation is the principle source rock with coal-measure mudstone as the main type of source rock.
焉耆盆地中生界含油气系统中，八道湾组是最主要的烃源岩层，烃源岩类型主要为煤系泥岩。
Here, open-source development has been a central principle.
在这里，开源开发一直是一个核心原则。
The underlying principle of information integration is for users to be able to see all of the data they use as if it resides at a single source.
信息集成的基本原理是让用户能够看见他们所使用的所有数据，就像这些数据都位于某个单一的数据源上一样。
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