The Earth isn't completely spherical - land at the North Pole is a number of kilometres nearer to the core of the planet than land at the Equator.
事实上，气球并非是一个完美的球体，北极地区要比赤道地区更加接近地心，两地之间的这一差距大概是在数公里。
Changes in the thickness, viscosity and conductivity of the outer core in the past could have led to convection patterns that caused the magnetic pole to tilt.
过去任何来自于核外层的厚度、粘性和导电性变化都会导致对流形式变化从而引起磁极倾斜。
Thee Earth isn't completely spherical - land at the North Pole is a number of kilometres nearer to the core of the planet than land at the Equator.
事实上，气球并非是一个完美的球体，北极地区要比赤道地区更加接近地心，两地之间的这一差距大概是在数公里。 E。
The unitary 4-salient pole rotor winding structure of modern synchronous alternator was mainly introduced, and the rotor iron core clamp mould and coiling mould for coiling rotor winding was designed.
主要介绍了现代同步发电机的四凸极整体转子绕组结构，设计了该绕组绕制用的转子铁心固定夹具和绕线模。
The unitary 4-salient pole rotor winding structure of modern synchronous alternator was mainly introduced, and the rotor iron core clamp mould and coiling mould for coiling rotor winding was designed.
主要介绍了现代同步发电机的四凸极整体转子绕组结构，设计了该绕组绕制用的转子铁心固定夹具和绕线模。
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