形容词
中文翻译：主要的
同义词：
['primary', 'primary-order例句：1. This is the primary reason for his success.（这是他成功的主要原因。）']
例句：
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1. This is the primary reason for his success.
这是他成功的主要原因。
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2. The primary function of this tool is to clean the floor.
这个工具的主要功能是清洁地板。
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3. Primary education is crucial for a child's development.
基础教育对于孩子的发展至关重要。