慢速英语:Animal Weapons Offer Lessons for Human Arms Race

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mate – n. either one of a pair of animals that are reproduction partners

evolve – v. to change or develop slowly often into a better, more complex, or more advanced state; to develop by a process of evolution

prey – n. an animal that is hunted or killed by another animal for food

fangs – n. a long, sharp tooth

clumsy – adj. badly or awkwardly made or done

beach – n. an area covered with sand or small rocks that is next to an ocean or lake

deterrent – n. something that makes someone decide not to do something

warhead – n. the part of a missile that contains the explosive