extinction

简明释义

英[ɪkˈstɪŋkʃn]美[ɪkˈstɪŋkʃn]

n. 灭绝，消亡；（债务的）偿清；消光

英英释义

单词用法

同义词

反义词

例句

1.What could cause such high rates of extinction?

是什么导致了如此高的物种灭绝率？

2.Scientists have linked the mass extinction at the end of the Cretaceous with a meteorite impact on Earth.

科学家将白垩纪末期的大灭绝与地球上的陨石撞击联系起来。

3.The rates of extinction happening today are as great as the rates during these mass extinctions.

现今物种灭绝发生的速度和这些大规模灭绝的速度一样快。

4.The animals were ruthlessly hunted to the verge of extinction.

这些动物由于遭到无情的捕猎而濒于灭绝。

5.One consequence of global warming is extinction.

全球变暖的后果之一是物种灭绝。

6.In the 19th century, inbreeding nearly led to the extinction of the royal family.

19世纪，近亲婚配几乎导致了皇室宗族的灭绝。

7.I am sure you're all aware of the worrying situation with a large number of species facing extinction.

我相信你们都意识到了大量物种面临灭绝这个令人担忧的情况。

8.The rapid loss of habitats is leading many species to the brink of extinction.

栖息地的快速丧失正使许多物种濒临灭绝。

9.Climate change is one of the main drivers of species extinction.

气候变化是物种灭绝的主要因素之一。

10.Scientists are studying the genetic material of extinct species to understand the causes of their extinction.

科学家正在研究已灭绝物种的遗传材料，以了解其灭绝的原因。

11.Conservation efforts are crucial to prevent the extinction of endangered animals.

保护工作对防止濒危动物的灭绝至关重要。

12.The passenger pigeon was once abundant but faced extinction due to overhunting.

旅鸽曾经非常丰富，但由于过度捕猎而面临灭绝。

作文

The concept of extinction refers to the complete disappearance of a species from the planet. This phenomenon has been a part of Earth's history for millions of years, but the current rate of extinction is alarming. Scientists estimate that we are losing species at a rate 1,000 times faster than the natural background rate due to human activities. The primary drivers of this rapid extinction include habitat destruction, climate change, pollution, and overexploitation of resources.Habitat destruction is perhaps the most significant factor contributing to the current wave of extinction. As human populations grow, forests are cleared for agriculture, urban development, and infrastructure projects. This not only eliminates the homes of countless species but also fragments ecosystems, making it difficult for animals to find mates, food, and shelter. For example, the deforestation of the Amazon rainforest threatens thousands of species, including the iconic jaguar and numerous bird species. Climate change is another critical issue that exacerbates the risk of extinction. As global temperatures rise, many species struggle to adapt to their changing environments. Polar bears, for instance, rely on sea ice to hunt seals, their primary food source. As the ice melts due to warming temperatures, polar bears face starvation and declining populations. Similarly, coral reefs, which support diverse marine life, are suffering from bleaching events caused by increased ocean temperatures and acidification. The loss of these habitats can lead to widespread extinction of marine species.Pollution is also a significant contributor to the decline of many species. Chemicals released into the environment can poison wildlife, disrupt reproductive processes, and degrade habitats. For example, the use of pesticides in agriculture can have devastating effects on pollinators like bees, which are crucial for the pollination of many crops and wild plants. The decline of bee populations due to pesticide exposure poses a threat not only to their survival but also to food security for humans, as many fruits and vegetables depend on these insects for pollination.Overexploitation of resources, such as poaching and unsustainable fishing practices, further accelerates the rate of extinction. Many species are hunted to the brink of extinction for their fur, bones, and other body parts, often driven by demand in illegal wildlife markets. The African elephant, for example, faces severe threats from poaching for ivory, leading to significant declines in its population. Similarly, overfishing has led to the collapse of several fish populations, disrupting entire marine ecosystems and threatening the livelihoods of communities that depend on fishing.To combat the crisis of extinction, it is essential for individuals, governments, and organizations to work together. Conservation efforts, such as establishing protected areas, restoring habitats, and implementing sustainable practices, are crucial in preserving biodiversity. Education and awareness campaigns can also play a vital role in informing the public about the importance of protecting endangered species and their habitats.In conclusion, the issue of extinction is a pressing concern that requires immediate attention. The loss of species not only affects the balance of ecosystems but also has far-reaching consequences for human health and well-being. By taking action now, we can help prevent further extinction and ensure a healthier planet for future generations.

“灭绝”这个概念指的是一个物种在地球上的完全消失。这一现象已经存在于地球的历史中数百万年，但目前的灭绝速度令人担忧。科学家估计，由于人类活动，我们以比自然背景速率快1000倍的速度失去物种。导致这一快速灭绝的主要因素包括栖息地破坏、气候变化、污染和资源过度开发。栖息地破坏可能是导致当前灭绝潮的最重要因素。随着人类人口的增长，森林被清除用于农业、城市发展和基础设施项目。这不仅消除了无数物种的栖息地，还使生态系统破碎，动物难以找到伴侣、食物和庇护所。例如，亚马逊雨林的砍伐威胁着成千上万的物种，包括标志性的美洲虎和许多鸟类。气候变化是另一个加剧灭绝风险的关键问题。随着全球温度上升，许多物种难以适应其不断变化的环境。北极熊依赖海冰捕猎海豹，这是它们的主要食物来源。随着气温上升，冰层融化，北极熊面临饥饿和种群下降的问题。类似地，珊瑚礁支持着多样的海洋生物，但由于海洋温度和酸化增加而遭受漂白事件的影响。这些栖息地的丧失可能导致海洋物种的广泛灭绝。污染也是导致许多物种下降的重要因素。释放到环境中的化学物质可以毒害野生动物，干扰繁殖过程，破坏栖息地。例如，农业中使用的农药对蜜蜂等授粉者产生毁灭性影响，而这些授粉者对许多作物和野生植物的授粉至关重要。由于农药暴露，蜜蜂种群的下降不仅威胁到它们的生存，也威胁到人类的粮食安全，因为许多水果和蔬菜依赖这些昆虫进行授粉。资源的过度开发，如偷猎和不可持续的捕鱼实践，进一步加速了灭绝的速度。许多物种因其皮毛、骨骼和其他身体部分而被猎杀到灭绝的边缘，这通常是受到非法野生动物市场需求的驱动。例如，非洲象因象牙的偷猎面临严重威胁，导致其种群显著下降。类似地，过度捕鱼导致多个鱼类种群崩溃，破坏整个海洋生态系统，并威胁依赖捕鱼的社区生计。为了应对灭绝危机，个人、政府和组织必须共同努力。保护措施，如建立保护区、恢复栖息地和实施可持续实践，对于保护生物多样性至关重要。教育和宣传活动也可以在提高公众对保护濒危物种及其栖息地重要性的认识方面发挥重要作用。总之，灭绝问题是一个紧迫的关注点，需要立即关注。物种的丧失不仅影响生态系统的平衡，还有深远的后果，对人类的健康和福祉产生影响。通过现在采取行动，我们可以帮助防止进一步的灭绝，确保未来世代拥有一个更健康的星球。