形容词
中文翻译：主要的
同义词：
['primary', 'chief', 'primary-stage']
例句：
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1.The primary goal of the project is to improve efficiency.
该项目的首要目标是提高效率。
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2. The primary reason for his absence was due to a sudden illness.
他缺席的主要原因是由于突发疾病。
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3. Primary school education is crucial for children's development.
小学教育对于儿童的发展至关重要。