So biologists were delighted early this year when, with the help of the Navy, theywere able to track a particular blue whale for 43 days, monitoring its sounds.
playmate [n.]玩伴
2005-12 阅读
A three-year-old might need help in understanding that other children feel painjust as he does, and that hitting a playmate over the head with a heavy toy requires an apology.
climate [n.]气候
2011-6 阅读
More than 90% of the human and economic losses from climate change are occurring in poor countries, according to the report.
welfare [adj.]福利的&（美国）社会保障金
2000-6 阅读
While still in its early stages, welfare reform has already been judged a great success in many states—at least in getting people off welfare.
learn [v.]学习
2006-6 阅读
Or they may wish to expose their children to another culture, and the opportunity to learn a second language.
event [n.]事件
2010-12 听力
They’re also sharing information about concerts and sports events as well as jokes and their philosophies of life.
concept [n.]观念
2006-12 阅读
And by focusing attention on healthy ways of living, the concept of wellness can have a beneficial impact on the ways in which people face the challenges of daily life.
eventually [adv.]终于
2013-6 阅读
The pledge is currently worth about $150 billion, but the programme predicts it will eventually be worth $600 billion.
concentration [n.]浓缩
2005-1 阅读
A study published recently in the journal Nature shows that air-borne leaded gas emissions from the United States were the leading contributor to the high concentration of lead in the snow in Greenland.
explanation [n.]解释
2013-6 阅读
Although many attribute Kodak’s downfall to “complacency,” that explanation doesn’t acknowledge the lengths to which the company went to reinvent itself.
