单词：boiler horse power
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The most powerful source of energy on the planet is actually out in space. It's our sun. More energy falls as sunlight on the US in a single day than it uses in a year. But it's been difficult to turn that sunlight into electricity. Many of us alread
自然百科2009年
This is AP news minute. 1. President Donald Trump's speech Friday to the leading conservative group is like a series of greatest hits from his campaign rallies. He reminisced about his victory in the republican primaries. He vowed to build the wall a
美联社新闻一分钟2017(二)月
JUDY WOODRUFF:Now the challenges of combating climate change. This week, the European Union announced it was loosening its strict environmental regulations in the face of economic setbacks. In the U.S., renewable sources of energy like wind and solar
PBS访谈环境系列
Science and technology 科学技术 Solar energy 太阳能 Flower power 花朵的能量 In matters of clever design, nature has often got there first 若论巧夺天工，自然常常更胜一筹 A virtuous spiral 上面的螺纹看似简单，实际有
经济学人科技系列
There would soon be an explosion; the kettle would be burst open. It is in this way that boiler explosions are often caused. When there is too much steam in a boiler, and it cannot get out, it presses against the sides of the boiler, until at last th
英国学生科学读本
Until the dawn of his fifteenth name day, when he had been awakened to find his horse saddled and ready. 直到他十五岁命名日那天清晨，他被叫醒后，发现自己的马已经鞍辔妥当，正等着他。 Three men-at-arms had escorted
冰与火之歌系列之《权力的游戏》