ENU：东西向上
“东-北-天”（East North Up，简称ENU）是一个常用的空间坐标系术语，通常为了方便书写和应用而被缩写为ENU。该坐标系广泛用于导航、地理信息系统和工程测量等领域，主要用于描述物体在水平方向的东向、北向以及垂直方向的天空向上位置。虽然常见于综合领域，但其应用并未严格限定类别。在中文语境中，ENU可直译为“东-北-上”或简称为“东西向上”，强调水平与垂直方向的定位基准。
East North Up的英文发音
例句
- Horizontal gyro drift is measured in state of azimuthal alignment by the two localization laws of the three directions of north, west and up, as well as east, north and up.
- 通过方位精对准状态在北西天坐标系和东北天坐标系两次定位测量水平陀螺漂移，在水平精对准状态下记录北向速度并采用最小二乘法解算方位陀螺漂移。
- To study incentives for foreign investment in the country's key projects such as electricity and gas transmission from the west to the east, water diversion from the south to the north to pace up infrastructure construction of the western regions.
- 研究鼓励外商投资西电东送、西气东输、南水北调等国家骨干工程的政策，加快西部地区基础设施建设步伐。
- Since the second half of 2008, most new investments by Mena SWFs were relatively small and the Middle East and Asia attracted the most new overseas activity, while investment in North America all but dried up, the report says.
- 报告表示，自2008年下半年以来，中东及北非主权财富基金的新投资大部分数额较小；中东和亚洲吸引了最多的新海外投资，而北美地区的投资几近干涸。
- Lost in the euphoria sweeping through the Middle East and North Africa is the fact that in many of these countries, including Libya, oil revenues have propped up corrupt regimes but not benefited their people.
- 在席卷中东和北非的欢腾浪潮之中，人们遗忘了一点事实：在这些地区的许多国家，包括利比亚，石油收入支撑着腐败政权，却没有造福人民。
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