extinction /ɪkˈstɪŋkʃn/，名词：灭绝，消亡
单词记忆
首先认识一个名词：“丁克”，指代自愿选择不生育的人群。然后了解 `extinction`：前缀 `ex-` 表示“出去”，后缀 `-tion` 表示名词，中间的 `tinc` 发音类似“丁克”。如果地球上所有人都丁克，人类将从地球上“消失”，因此 `extinction` 的含义是“灭绝”或“消亡”。
单词用法
extinction /ɪkˈstɪŋkʃn/，名词：灭绝，消亡
> One consequence of global warming is extinction.
> 全球变暖的后果之一是物种灭绝。
巩固练习
> (1) 这些措施不足以保护海龟免于灭绝，我们还需要考虑人类活动对它们生存的影响。(consider)
答案：
> (1) These measures are not enough to protect turtles from extinction, and we need to consider the impact that human activities have had on their survival.
拓展
extinct /ɪkˈstɪŋkt/，形容词：灭绝的；消亡的
> As is known to all, the panda is in danger of becoming extinct.
> 众所周知，熊猫濒临灭绝。
拓展巩固练习
> (1) 有些动物灭绝的原因是它们无法适应新的环境，因此我们必须注意保持生态平衡。(adapt)
答案：
> (1) The reason why some animals became extinct was that they were unable to adapt to the new environment, so we must pay attention to keeping the balance of nature.