名词
中文翻译：光学参考球同义词
同义词：
['optical ball', 'optical reference ball']
例句：
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1. The engineer used an ORB to measure the distance between two points on the surface of the earth.
工程师使用一个光学参考球来测量地球表面两点之间的距离。
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2. The scientist conducted a series of experiments using an ORB to study the behavior of light in different environments.
科学家使用一个光学参考球进行了一系列实验，以研究光在不同环境中的行为。
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3. The astronaut used an ORB during the spacewalk to ensure that they were accurately positioned relative to each otherand the Earth.
宇航员在太空行走时使用了光学参考球，以确保他们相对于彼此和地球的位置准确无误。