学个词 Learn a Word-VOA英语教学 2415 euthanize

今天我们要学的词是 euthanize. Euthanize 动词，安乐死。So far, wildlife managers have euthanized 24 grizzly¹ bears in the Greater Yellowstone Ecosystem² this year. 野生动物管理人员今年在黄石公园生态区已经对24只灰熊实施安乐死。In the past five years, a total of 72 grizzly bears have been euthanized in the area because they either killed cattle, destroyed property, or posed a danger to people. 过去五年里，该地区共有72只灰熊因捕食牛，破坏财物，或是对人类构成威胁而被安乐死。好的，今天我们学习的词是 euthanize, euthanize, euthanize...

1 grizzly   

adj.略为灰色的，呈灰色的；n.灰色大熊

参考例句：

• This grizzly liked people.这只灰熊却喜欢人。
• Grizzly bears are not generally social creatures.一般说来，灰熊不是社交型动物。

2 ecosystem   

n.生态系统

参考例句：

• This destroyed the ecosystem of the island.这样破坏了岛上的生态系统。
• We all have an interest in maintaining the integrity of the ecosystem.维持生态系统的完整是我们共同的利益。