标准摘要 [中文适用范围]： 本文件定义了在科学技术中广泛使用的无人驾驶飞机系统相关术语。 [外文原描述]： This document defines terms relating to uncrewed aircraft systems that are widely used in science and technology. 展开完整摘要 英文名称Uncrewed aircraft systems — Part 4: Vocabulary