【英语时差8,16】人类活动导致企鹅数量减少（上）

Like the canaries that used to be brought into coal mines as early warning signals for toxic¹ gases like methane², the world’s penguins⁴ are sounding an alarm of potentially disastrous⁵ ocean changes. Of the seventeen species of penguins, twelve are declining rapidly in number and are listed as endangered or threatened. A study published in 2008 by a Professor of Conservation Biology at the University of Washington links this widespread decline in penguin³ numbers, in large part, to human activity. One cause is the rising ocean temperatures and increasingly erratic⁶ temperature and climate patterns. In the Antarctic Peninsula, where many penguins breed, temperatures are rising five times faster than the average rate of global warming, and sea ice covers forty-percent less area off the peninsula than it did twenty-six years ago.

1 toxic   

adj.有毒的，因中毒引起的

参考例句：

• The factory had accidentally released a quantity of toxic waste into the sea.这家工厂意外泄漏大量有毒废物到海中。
• There is a risk that toxic chemicals might be blasted into the atmosphere.爆炸后有毒化学物质可能会进入大气层。

2 methane   

n.甲烷，沼气

参考例句：

• The blast was caused by pockets of methane gas that ignited.爆炸是由数袋甲烷气体着火引起的。
• Methane may have extraterrestrial significance.甲烷具有星际意义。

3 penguin   

n.企鹅

参考例句：

• The penguin is a flightless bird.企鹅是一种不会飞的鸟。
• He walked with an awkward gait like a penguin.他走路的步子难看得就像企鹅。

4 penguins   

n.企鹅( penguin的名词复数 )

参考例句：

• Why can penguins live in cold environment? 为什么企鹅能生活在寒冷的环境中？ 来自《简明英汉词典》
• Whales, seals, penguins, and turtles have flippers. 鲸、海豹，企鹅和海龟均有鳍形肢。 来自《现代英汉综合大词典》

5 disastrous   

adj.灾难性的，造成灾害的；极坏的，很糟的

参考例句：

• The heavy rainstorm caused a disastrous flood.暴雨成灾。
• Her investment had disastrous consequences.She lost everything she owned.她的投资结果很惨，血本无归。

6 erratic   

adj.古怪的，反复无常的，不稳定的

参考例句：

• The old man had always been cranky and erratic.那老头儿性情古怪,反复无常。
• The erratic fluctuation of market prices is in consequence of unstable economy.经济波动致使市场物价忽起忽落。