名词
中文翻译：Unknown
同义词：
['1. affirmation', '2.negation', '3. affirmative', '4. negative', '5.negate', '6. refute', '7. deny', '8. counteract', '9.oppose', '10. contradict']
例句：
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1. In mathematics, affirmation and negation are two fundamental concepts that help us understand the relationship between numbers.
在数学中，肯定和否定是两个基本概念，它们帮助我们理解数字之间的关系。
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2. The scientist affirmed the theory but also challenged its limitations.
这位科学家肯定了这一理论，但也对其局限性提出了挑战。
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3. The teacher negated the student's argument by pointing out a flaw in the evidence.
老师通过指出证据中的一个漏洞否定了学生的论点。