单词:permanent-magnet pole
单词:permanent-magnet pole 相关文章
By Parke Brewer The women's pole vault provided one of the stirring dramas of the 2004 Olympic track and field competition. Until the mid 1990s, women's pole vault was not taken very seriously, mainly
When you sail for London you have to set your watch ahead each night when you go to bed, 如果你乘船去伦敦,每天晚上睡觉前你必须把手表调快一点, so that when you reach London your watch will be five hours ahead of the time y
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Magnet 磁铁 Magnets are very interesting objects. 磁铁是非常有趣的物体。 Each has a positive pole and a negative pole. 每个磁铁都有正负极。 One for each end. 磁铁两端各为一极。 Similar poles push each other away. 磁铁同
Saturns apparently peaceful appearance is due to a haze of high level ammonia in the upper atmosphere, by looking deep into Saturn in the infrared, using the planets own internal heat as a light source, Cassini has revealed the planets true nature. T
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