科学家称，一头座头鲸完成了有记录以来最长且最不寻常的迁徙之一，气候变化可能是导致这头鲸迁徙的原因。这头座头鲸于 2017 年在哥伦比亚附近的太平洋被发现，几年后又在印度洋桑给巴尔附近突然出现 ，迁徙 距离至少 为 1.3 万 公里。
Humpback whales are known for having one of the longest migrations of any mammal, migrating from their summer feeding grounds to breed in warmer waters closer to the equator.
座头鲸是哺乳动物中迁徙距离最长的物种，并以此闻名，它们从夏季的觅食地迁徙到靠近赤道的温暖水域进行繁殖。
But international researchers say this adult male humpback had one of the longest and most unusual migrations ever recorded, visiting breeding grounds in both the Pacific and the Indian Ocean over the course of several years.
但是有关国际研究人员称这头成年雄性座头鲸进行了有记录以来最漫长且最不寻常的迁徙之一，在几年的时间里抵达了太平洋和印度洋的繁殖地。
They think this epic journey might be down to climate change shrinking populations of krill, the tiny, shrimp-like creatures humpback whales feed on. Or it could be an ocean odyssey to find a mate.
他们认为这次极其漫长的迁徙旅程可能是由气候变化导致磷虾的数量减少造成的，因为这种微小的虾状生物是座头鲸的食物。另外，这也有可能是一次寻找伴侣的海洋冒险之旅。
The researchers hope a citizen science project analysing hundreds of thousands of photographs of whales through artificial intelligence will help give an answer. Whales can be identified through the individual shapes and patterns of their tails, allowing their movement around the globe to be mapped.
研究人员希望一个通过人工智能分析数十万张鲸鱼照片的公民科学项目能够帮忙找到答案。人们可以通过鲸鱼独特的尾部形状和纹理来识别它们，从而绘制出它们在全球范围内的迁徙路线。
词汇表
humpback whales 座头鲸
migrations 迁徙
mammal 哺乳动物
feeding grounds 觅食地
breed 繁殖
krill 磷虾
odyssey 漫长而惊险的旅途
mate （动物的）配偶
artificial intelligence 人工智能
mapped 绘制
听力练习
一、听第一遍音频，回答问题。
1. Write a one sentence summary of this news piece.
二、用一分钟阅读下列问题，然后听第二遍音频并回答问题。
1. Humpback whales have one of the longest migrations of any mammal.
a. True
b. False
c. Not given
2. Why did the whale travel so far?
a. to find food, like krill
b. to breed
c. researchers don't know exactly why
3. How will researchers discover why the whale travelled so far?
a. by using artificial intelligence to take photographs
b. through analysis of photographs
c. by using research from a range of community projects
4. How can whales be identified?
a. by details on their tails
b. by the shape of their head
c. by using tracking devices
三、听第三遍音频，将句子补充完整。（提示：可以反复听，直到听清楚每一个词）
1. This adult male humpback had one of the longest and most _______ migrations ever recorded.
2. It could be an ocean _______ to find a mate.
答案
一、听第一遍音频，回答问题。
1. Write a one sentence summary of this news piece.
Own answers. For example: A whale has travelled on a very long migration, possibly because of climate change or to find a mate.
二、用一分钟阅读下列问题，然后听第二遍音频并回答问题。
1. a. True. Humpback whales are known for having one of the longest migrations of any mammal.
2. c. They think this epic journey might be down to climate change shrinking populations of krill, or it could be an ocean odyssey to find a mate.
3. b. The researchers hope a citizen science project analysing hundreds of thousands of photographs of whales through artificial intelligence will help give an answer.
4. a. Whales can be identified through the individual shapes and patterns of their tails.
三、听第三遍音频，将句子补充完整。（提示：可以反复听，直到听清楚每一个词）
1. This adult male humpback had one of the longest and most unusual migrations ever recorded.
2. It could be an ocean odyssey to find a mate.