当看见熊爸爸拉着梯子，从雪堆前费力地走过时，小熊西奥多拉起毛茸茸的围巾捂住冰凉的鼻子，然后开口问道，“您在干什么？”
“What are you doing?” asked Theodore, pulling his woolly scarf over his chilly nose.
美国地质调查局2007年进行的一项研究发现：如果北极地区的冰层持续融化，那么地球上三分之二的北极熊在本世纪中叶前就可能消失。
A 2007 study by the U.S. Geological Survey found that two-thirds of the polar bears on the planet could disappear by mid-century if Arctic ice keeps melting.
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