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PBS高端访谈:揭秘矮行星--谷神星的秘密
JUDY WOODRUFF: Let's look at a space mission that's generating lots of interest and excitement. It's the mission to orbit the dwarf planet Ceres by the NASA spacecraft named Dawn.
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PBS高端访谈:饮用水管道是如何同时进行发电的?
JUDY WOODRUFF: Next: the possibilities of getting more energy through water.
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PBS高端访谈:濒临灭绝的虎鲸将会被放归自然?
HARI SREENIVASAN: You may have seen the documentary "Blackfish" that examined the treatment of killer whales at SeaWorld Orlando. Now at the Miami Seaquarium, another controversy is brewing...
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PBS高端访谈:帝王蝶可能会成为濒临灭绝的物种
HARI SREENIVASAN: Every year, millions of North American monarch butterflies head south for the winter in one of the insect world's most fantastic feats.
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PBS高端访谈:科学家根据阿拉斯加冰雪层的状况监测气候变化
GWEN IFILL: Finally tonight: how climate change may be affecting life in Alaska as we know it and the captivating images we see there, from ice to Marine life.
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PBS高端访谈:墨西哥城正面临日益严峻的用水危机
GWEN IFILL: Violent protests continued in Mexico today. Demonstrators clashed with police in Acapulco, as anger mounted over the disappearance of 43 students.
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PBS高端访谈:敦促商界注意气候的变化
JUDY WOODRUFF: Finally tonight: new estimates on the cost of climate change and the attention it's drawing about the potential economic effect in the U.S.
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PBS高端访谈:在矿产州,民主党寻求减排计划的可能性
GWEN IFILL: The president's proposal to cut carbon emissions may not take full effect for several years, but the politics kicked in immediately.
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PBS高端访谈:美国环保局局长为白宫节能减排的计划摇旗呐喊
GWEN IFILL: From the night he was reelected, President Obama has made clear that cutting greenhouse gas emissions was a centerpiece of his second-term agenda.
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PBS高端访谈:加州太阳能项目对栖息地的影响
This week, the European Union announced it was loosening its strict environmental regulations in the face of economic setbacks.
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PBS高端访谈:治水紧急措施
And we are at the mercy of the principals involved, mainly West Virginia American Water Company, because they are probably going to be decides when they feel like it's safe for people to bathe ...
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PBS高端访谈:转基因作物引发争议
Today these fields are home to large biotech companies developing Hawaii’s biggest agricultural product: seeds. Genetically modified seeds, mostly corn, to be shipped back and grown on the mainland.
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PBS高端访谈:世界大国恢复伊朗核会谈
As pressure builds from critics of a nuclear deal with Iran, negotiators are back in Genevafor another round of talks.Our chief foreign affairs correspondent, Margaret Warner, is also there.
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PBS高端访谈:EPA削减不同程度的乙醇量来测量环境状况
Next: the changing requirements for ethanol in gasoline and bigger questions over its wider use in recent years.
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PBS高端访谈:台风海燕造成菲律宾巨大损失
In the Philippines, speed may have saved lives. The massive typhoon that ripped across that country moved at about 25 miles per hour, so fast, it decreased the impact of rain and landslides, which ...
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