慢速英语:寒冷干燥的气候可能导致穴居人消失

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species – n. a group of animals or plants that are similar and can produce young animals or plants

archaeological – adj. related to the science that deals with past human life and activities by studying the bones and tools of ancient people

ecological – adj. related to the science that deals with the relationships between groups of living things and their environments

cave(s) – n. a large hole that was formed by natural processes in the side of a cliff or hill or under the ground

adapt(ed) – v. to change your behavior so that it is easier to live in a particular place or situation

refreshing – adj. pleasantly new, different, or interesting

outsmart – v. to defeat or trick someone by being more intelligent or clever

out-survive(d) – v. to remain alive or in existence for longer or more effectively than others