名词
中文翻译：基数词
同义词：
['prime', 'principal例句：1. The cardinal rule of the game is to never give up.（这个游戏的首要规则是永不放弃。）']
例句：
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1. The cardinal rule of the game is to never give up.
这个游戏的首要规则是永不放弃。
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2. The cardinal sins are pride and arrogance.
首要的罪恶是骄傲和自大。
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3. The cardinal points of the map are marked with stars.
地图上的主要点用星星标记。