加拿大小鎮丘吉爾被稱為 “北極熊之都”。每年，小鎮附近的哈德森灣海冰都會融化，迫使北極熊爬上海岸。而當秋天到來時，上百對北極熊就會聚集在此等待海水再次結冰。北極熊通過海冰狩獵它們的主要獵物海豹。
In Churchill, at the start of winter, the polar bear alert team often has to chase bears away from town. The animals gather in this area when the bay here starts to freeze. The sea ice is the platform that polar bears need to hunt seals.
在丘吉爾初冬時節，北極熊預警小隊就需要把北極熊從小鎮上趕走。北極熊會在海灣開始結冰的時候聚集在這個地區。海冰是北極熊用於捕獵海豹的平臺。
Researchers from the organisation Polar Bears International say that the population of bears here has declined by about half since the 1980s. Experts have tied that decline to rising temperatures. This means that polar bears are on shore, closer to people, for more of the year.
北極熊國際協會的研究人員表示，自上世紀 80 年代以來，這裡的北極熊數量已經減少瞭大約一半。專傢將北極熊數量的減少歸咎於氣溫上升。氣溫上升意味著北極熊在一年當中有更長時間需要在岸上距離人類更近的地方活動。
So, researchers working in Churchill are now developing a radar-based bear detection system that they say will help keep remote Arctic communities safe in a changing climate.
所以，在丘吉爾工作的研究人員正在開發一個基於雷達技術的北極熊偵測系統，他們認為這一系統能夠在氣候變化的大環境下保護居住在北極偏遠地區人們的安全。
詞匯表
chase 驅趕
gather 聚集
bay 海灣
have tied 將…歸咎於
on shore 在岸上
radar-based 基於雷達技術的
聽力練習
一、聽第一遍音頻，回答問題。
1. Why do the polar bears spend the summer on shore?
二、用一分鐘閱讀下列問題，然後聽第二遍音頻並回答問題。
1. What does the polar bear alert team often have to do?
a. warn people that bears are close
b. alert the bears that people are close
c. chase the bears from the town
2. The bear population has increased in Churchill since the 1980s.
a. True
b. False
c. Not given
3. Polar bears are on shore for more of the year due to rising temperatures.
a. True
b. False
c. Not given
4. Why are researchers in Churchill developing a radar-based bear detection system?
a. to protect remote Arctic communities
b. to study bear feeding patterns
c. to hunt bears for their meat
5. Human beings like living alongside the bear population in Churchill.
a. True
b. False
c. Not given
三、聽第三遍音頻，將句子補充完整。（提示：可以反復聽，直到聽清楚每一個詞）
1. The _______ is the platform that polar bears need to hunt seals.
2. Researchers working in Churchill _______ a radar-based bear detection system.
答案
一、聽第一遍音頻，回答問題。
1. Why do the polar bears spend the summer on shore?
The polar bears spend the summer on shore because the sea ice, their usual hunting ground, melts.
二、用一分鐘閱讀下列問題，然後聽第二遍音頻並回答問題。
1. c. The polar bear alert team often has to chase bears away from town.
2. b. False. The population of bears here has declined by about half since the 1980s.
3. a. True. Because of rising temperatures, polar bears are on shore, closer to people, for more of the year.
4. a. Researchers say a radar-based bear detection system will help keep remote Arctic communities safe in a changing climate.
5. Not given. There is no mention of whether the people in Churchill like living alongside polar bears.
三、聽第三遍音頻，將句子補充完整。（提示：可以反復聽，直到聽清楚每一個詞）
1. The sea ice is the platform that polar bears need to hunt seals.
2. Researchers working in Churchill are now developing a radar-based bear detection system.
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