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The reversal process is not literally periodic as it is on the sun,whose magnetic field reverses every 11 years. 倒转过程不是真正具有像在太阳上那样的周期性，太阳磁场每11年出现倒转。
The reversal process is not literally periodic as it is on the sun, whose magnetic field reverses every 11 years. 倒转过程不是真正具有像在太阳上那样的周期性，太阳磁场每11年出现倒转。
Magnetic field, auroras,magnetic declination and magnetic field reversals. 地球的磁场、极光、磁偏角和地磁极倒转。
A heat pump is a reversible system and is commonly used both to heat and to cool buildings. 热泵一般用于建筑物的供暖与冷却的双向系统。
Occasionally, however, the dipole part of the field reverses, causing the locations of the north and south magnetic poles to switch. 不过，有时候磁场的偶极部分会倒转，导致了北磁极和南磁极的位置转换。
The thrust reverser system reversers the direction of the fan exhaust during landing and provides additional brakeing of the airplane. 反推装置系统将降落阶段风扇排放的气流反向并辅助飞机刹车。
Occasionally,however,the dipole part of the field reverses,causing the locations of the north and south magnetic poles to switch. 不过，有时候磁场的偶极部分会倒转，导致了北磁极和南磁极的位置转换。
So the rare field reversals are most likely caused by larger changes in the flow in the outer core, or in the way in which the field lines are wound into the flow by diffusion. 这样，不经常发生的磁场倒转，很可能是由外核流体或磁场曲线通过扩散宛然进人流体方式发生较大的变化而引起的。
So the rare field reversals are most likely caused by larger changes in the flow in the outer core,or in the way in which the field lines are wound into the flow by diffusion. 这样，不经常发生的磁场倒转，很可能是由外核流体或磁场曲线通过扩散宛然进人流体方式发生较大的变化而引起的。
Stainless steel hopper construction Main controller and hopper designed separated to ensures safety and convenient; Separate filler installation, easy to remove pooling of powder; Automatic pump reverse system. 过载、缺料报警;不锈钢料斗;主机与料桶分体设计,安全简便;独立滤清装置,方便清除集尘;具有逆转自动清除粉尘功能。
As the field wanes, the number of sunspots falls to a trough or minimum, at which point the sun's magnetic field reverses direction and starts to regain its strength. 随着磁场减弱，太阳黑子的数量会减少到最小值或者说最低点（波谷），然后太阳的磁场就会反方向运动，开始重新变强。
The Federal Reverse System Regulation Q put a ceiling on the interest rte that Unites States member banks could pay on deposits, to levels that were often below the rates paid by European banks. 联邦储备体系Q条例给美国会员银行存款利率设立了上线，这个上线经常低于欧洲银行支付的利率。
The field artillery pounded away at the for tress. 野战炮兵连续炮击那座要塞。
The geologic record also shows that the strength of the magnetic field varies widely in time, and fluctuates wildly during field reversals, sometimes dropping to zero gauss strength; ie: the field vanishes, disappears! 地质记录也表明磁场强度在时间上普遍变化，在磁场逆转期间广泛波动，有时降到零高斯强度；也就是：磁场消失不见了！
The crowd cheered as the teams entered the field. 球队入场时观众们为之欢呼。
On the map the drains of each field are laid sown. 地图上标有每一块地的排水沟。
Right-handed batters usually hit to left field. 右撇子击球手把球打到左外野。
The runaway horse was cornered in a field. 那匹跑掉的马在田地里被圈住了。
Tent is used by camper and by soldier in the field. 露营的人和战地的士兵用帐篷。
The children had a field day with their new toys. 孩子们玩新玩具玩得十分开心。