以下为句子列表：
英文: Some AR systems may also require certain moving objects to be tracked; for example, a system that provides visual guidance for a mechanic repairing a jet engine may need to track the positions and orientations of the engine's parts during disassembly.
中文: 有些AR系统也可能需要追踪某些移动的物件；举例来说，修复喷射引擎的技工在拆卸过程中，可能需要一个能追踪引擎零件的位置与方向的视觉导引系统。
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