名词
中文翻译：原因
同义词：
['cause', 'reason', 'rationale', 'motive例句：1. The sudden rain was a cause for celebration.（突如其来的雨是庆祝的原因。）']
例句：
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1. The sudden rain was a cause for celebration.
突如其来的雨是庆祝的原因。
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2. The decision was based on his reasoning.
这个决定是基于他的推理。
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3. The success of the project was due to their strong motivation.
项目的成功归功于他们强烈的动力。