形容词
中文翻译：首要的
同义词：
['primary', 'chief', 'foremost']
例句：
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1. The prime minister is the leader of the country.
首相是国家的领导人。
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2. The prime number is the first in a sequence of numbers.
质数是一系列数字中的第一个。
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3. Prime number theory is an area of mathematics that deals with prime numbers.
质数理论是数学的一个领域，研究质数。