名词
中文翻译：指示轴
同义词：
['indicator', 'axis例句：1. The indicatrix of the crystal is crucial for determining its optical properties.（晶体的指示轴对于确定其光学性质至关重要。）2. The indicatrix of a crystal can be used to calculate its refractive index.（晶体的指示轴可以用来计算它的折射率。）']
例句：
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1. The indicatrix of the crystal is crucial for determining its optical properties.
晶体的指示轴对于确定其光学性质至关重要。
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2. The indicatrix of a crystal can be used to calculate its refractive index.
晶体的指示轴可以用来计算它的折射率。
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3. The indicatrix of the crystal was measured using a microscope.
使用显微镜测量了晶体的指示轴。