名词
中文翻译：外部重力场
同义词：
['gravitational field', 'external field of gravity']
例句：
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1. The study of the external gravity field is crucial for understanding the behavior of planets.
研究外部重力场对于理解行星的行为至关重要。
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2. In this model, the external gravity field is represented by a vector field.
在这个模型中，外部重力场由一个向量场表示。
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3. The research on the external gravity field has made significant progress in recent years.
近年来，关于外部重力场的研究取得了显著进展。