n.反例；反典型例子

The claim that all primes are odd has a counterexample: the number 2.
陈述“所有质数都是奇数”有一个反例：数字2。
A common misconception is that all birds can fly, but the penguin serves as a counterexample.
一个常见的误解是所有鸟都会飞，但企鹅就是一个反例。
The belief that all flowers need sunlight to grow is disproven by the counterexample of certain cave-dwelling plants.
认为所有花都需要阳光才能生长的观点被某些洞穴植物的反例所否定。
The assertion that no square number is prime has the counterexample of 2 (since 2 is both a prime and a square number).
断言没有平方数是质数，但2是一个反例（因为2既是质数也是平方数）。
The proposition that all mammals give birth to live young doesn't hold true when considering the platypus, which lays eggs – a clear counterexample.
所有哺乳动物都生下活的幼仔这一命题在考虑到鸭嘴兽时并不成立，因为鸭嘴兽是下蛋的——这是一个明显的反例。
It's often said that all metals conduct electricity well, but mercury at very low temperatures is a counterexample, becoming a superconductor.
人们常说所有金属都是良好的导电体，但汞在极低温度下成为超导体，这是个反例。
The argument that every country has a coastline fails to account for landlocked nations like Switzerland, serving as a counterexample.
每个国家都有海岸线的说法没有考虑到像瑞士这样的内陆国家，这是一个反例。
The statement "all fruits are sweet" is contradicted by the counterexample of lemons, which are naturally sour.
“所有水果都是甜的”这个说法被柠檬这个反例所反驳，柠檬天生是酸的。
The theory that heavy objects fall faster than light ones was disproven by Galileo's experiment, demonstrating that a feather and a lead ball dropped in a vacuum fall at the same rate – a historical counterexample.
重物比轻物落得快的理论被伽利略的实验所推翻，实验证明在真空中羽毛和铅球以相同的速度下落——这是一个历史上的反例。
Some believe that all deserts are hot, but the cold desert of Antarctica serves as a significant counterexample.
有人认为所有的沙漠都是炎热的，但南极洲的寒冷沙漠是一个重要的反例。