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- The magnetism of the earth. 地磁地球的磁力
- Our pilotless rocket enters the track of the earth. 我们把一个无人驾驶的火箭送入了地球的轨道里。
- The attraction of the moon for the earth causes the tides. 月球对地球的吸引力造成潮汐。
- That is a mysterious spirit, from which derives all the magnetism of the north. 那是一个神秘的幽灵，北方全部的魅力都因它而生。
- The study of the earth's magnetism. 地磁学研究地球磁力的学科
- What percentage of the earth is covered by oceans? 地球上百分之多少被海水覆盖着？
- Then some new ideas came along that enabled the scientists to study the magnetism of the human body. 随后出现了一些新的见解，促使科学家们去研究人体的磁性。
- The heated air drinks up the moisture of the earth. 热空气把土里的湿气都吸干了。
- The magnetic field of the earth creates a torque around the pivot. 地球的磁场在支点周围产生一个转矩。
- What is it like in the bowels of the earth? 地球内部是什么样子？
- A piece of glass is laid on top of the magnet. 一块玻璃被搁在那磁铁的上面。
- Nitrogen forms most of the Earth's air. 地球上空气的大部分成分是氮气。
- The bird-song is the echo of the morning light back from the earth. 鸟的歌声是曙光从大地反响过去的回声。
- They think of themselves as the salt of the earth. 他们自认为是社会中坚。
- The boy asked what lay in the bosom of the earth. 那男孩问地球内部是什么。
- The first blades of grass speared out of the earth. 第一批青草的叶片破土而出。
- Geologists have calculated the age of the earth. 地质学家已经计算出了地球的年龄。
- The magnets of BLDCM are felted with featheredge of the motor, and then are machining. 摘要无刷直流电动机的磁钢需要和薄壁磁轭粘接，并在粘接后还要机械加工。
- Nitrogen forms about 78% of the earth's atmosphere. 氮约占地球大气的百分之七十八。
- The magnetization of the first layer is fixed, or pinned, but the second ferromagnetic layer is not. 第一层铁磁金属的磁化强度是固定的，第二层则可以改变。
