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Scientists: Spiders Use Electric Fields to Move through Air Scientists have long wondered how spiders can use the webbing they make to fly. The 19th century English naturalist Charles Darwin commented on their behavior when very small spiders landed

发表于:2018-12-16 / 阅读(53) / 评论(0) 分类 2018年VOA慢速英语(七)月

If you splashed down in the Atlantic, you'd flounder on which way to swim. But a hatchling loggerhead turtle would know just where to paddleby reading the Earth's magnetic field. Scientists knew turtles can pinpoint latitude this way, because the fie

发表于:2018-12-24 / 阅读(49) / 评论(0) 分类 Scientific American(二)月

Tornados are one of the most frightening weather phenomena on our planet. Not only are they unique in how they form, but also in how they are measured . A tornados intensity is defined by the Enhanced Fujita Scale. On this scale, the intensity of the

发表于:2018-12-28 / 阅读(59) / 评论(0) 分类 轻松英文阅读

As the reversal approaches, the decay of our magnetic field will continue and cosmic radiation will get increasingly close to the Earth's surface. As the reversal approaches, the decay of our magnetic field will continue and cosmic radiation will get

发表于:2019-01-22 / 阅读(41) / 评论(0) 分类 自然百科2011年

It's clear from the fact that the Martian crust is strongly magnetized, that there must have been a magnetic field on Mars in the past, that the only way we know to magnetize rocks is for them to form in the presence of magnetic field. Why did Mars l

发表于:2019-01-22 / 阅读(44) / 评论(0) 分类 自然百科2011年

Maybe, I added, it's no more approachable than an electric eel or an electric ray! 也许,我又说,我们不能接近它,就像不能接近一条电鳗,或一个水雷那样! Right, the commander replied. And if it has their power to electro

发表于:2019-01-28 / 阅读(26) / 评论(0) 分类 《海底两万里》中英双语有声读物