单词：lava field
单词：lava field 相关文章
Jack didn't feel like a happy camper anymore. Walking through the cold, thin air, he looked at thesnowmobiles parked near the hut. We don't know how to drive snowmobiles! Jackwhispered to Annie. We haven't trained foranything, including altitude sick
汪培珽儿童英文分级书单《神奇树屋》
Called the hellhole of creation, the Afar Triangle lies at the junction of three continental plates which spread further each year. The oldest living lava lake and one of the lowest points on the planet. Geologists here can study the process that for
国家地理2007年
Glatsmire's model shows that the magnetic poles swap places spontaneously due to / complex processes within the core. We were used to the idea that a compass points somewhere near the North Pole and hence we can use it for navigation, but there are p
自然百科2011年
By analyzing thousands of lava samples, geophysicists discover/ that the Earth's magnetic field has reversed over 18,000 times in the last 20 million years. On either side of these reversals is a long period of dramatically reduced field strength. Du
自然百科2011年
By analyzing different samples of lava, Herrero / Bervera has built up a picture of how the filed has changed since long before humans were around. They are actually the recorders of the Earth's magnetic field in hundreds of years, thousands of years
自然百科2011年