He grew a different crop on the same field five years in a row, what researchers call crop rotation.
他连续5年在同一块地上轮流种植不同作物，研究人员称之为轮作。
More about curl.If we have a velocity field, then we have seen that the curl measures the rotation affects.
关于旋度的更多介绍，设有一速度场，我们知道旋度是测量旋转影响的。
In particular, a force field with no curl is a force field that does not generate any rotation motion.
特别地，一个没有旋度的力场，就是一个不产生任何旋转运动的力场。
The combination of rapid rotation and ultra-strong magnetic field makes B1509 one of the most powerful electromagnetic generators in the Galaxy.
快速旋转和超强磁场的结合使B1509成为了银河系中最强大的电磁发电机之一。
Measures the rotation part of a velocity field.
它度量了流速场的旋转。
True timing allows all rotation of field to be in time with one another and in time with the rotation of the field of earth.
真正计时，允许能量场的所有转动都彼此符合节拍，或者和地球能量场的振动保持节拍。
The 11-hour intervals approximated but didn't match Saturn's rotation rate, so the planet's magnetic field couldn't be the source.
11个小时的间隔接近土星的转动速度，但是并不正好匹配，因此土星的磁场不是信号源。
This quick rotation powered a strong magnetic field, which heated the sun’s atmosphere and carried away mass and angular momentum in a strong solar wind of charged particles.
这个磁场加热了太阳的大气层并且带走了由带电粒子（charged particle）组成的强大太阳风的质量（mass）和角动量（angularmomentum）。
When the sun's rotation sweeps this warped surface across the earth, we detect sudden changes in the polarity of the magnetic field.
当太阳的自转使这个波浪形间隔面扫过地球时，我们就会探测到磁场极性的突然反转。
Internally the DSI sensors use analogue Hall Effect elements, which measure the change of magnetic field that is created by the gear rotation.
DSI传感器内部结构采用类似于霍尔效应的原理，测量齿轮旋转引发的磁场变化。
The results show that the missile rotation has hardly effect on inner flow field structure of SFE, but some effects on the control thrust of attitude control motors both in magnitude and in direction.
结果表明，弹体旋转对超音速射流元件内部流场结构几乎没有影响，而对姿态控制发动机的控制推力大小和方向的影响不容忽视。
Forgiveness is the foundation of ascension and if one cannot forgive, and then one cannot ascend beyond a certain mechanical level of field rotation.
宽恕是提升的基础，如果一个人不能宽恕，而随之他不能提升出当前场旋转的机械化层面。
Taking the well Hong 9 1 in Dagang Oil Field for example, the important role of the rotation of drilling string in removing cuttings bed in extended reach well is expounded.
并以国内大港油田大位移井红9—1为例，说明了钻柱旋转在大位移井中对清除岩屑床的重要作用。
Based on this model, the expressions of critical field for the irreversible reversal magnetization and the coercive force are derived for both the parallel rotation and symmetric fanning mechanisms.
基于此模型，推导了纳米线反磁化过程中不可逆磁化的临界场和矫顽力在一致转动和对称扇形模式下的表达式。
The result shows that the velocity field changes with the increase of space from shoulder and stir tool and the flow of weld metal from top to bottom and stir zone to rotation zone also weakens.
实验结果表明：随着距轴肩和搅拌针距离的增大，速度场开始减弱，焊缝金属由顶面向底面、由搅拌区向旋转区的流动也随之减弱。
Because the accretion disk itself is believed to be magnetized, the rotation of the disk can twist the magnetic field lines into a helix.
为我们相信吸积盘本身是被磁化的，圆盘的旋转可将磁力线扭曲成螺旋线圈状。
This will foster a more rapid rotation of field as it occurs in a treatment to oneself or upon another.
因此在对自我疗愈或对他人疗愈中，这将培育能量场更快速旋转。
Humans were whole enough in their own field rotation and DNA to call a whole resource of nonphysical to participate.
那时人类在自身能量场的转动和DNA中是足够完整的，从而召唤了一个完整的非物质源来参与。
Now let us syncopate the rhythm of the movement of our molecules and energy field to the rotation of the molecules of earth.
现在让我们将分子及能量场运动的节奏切分到地球分子的旋转之中。
Magnetic susceptibility of polygranular carbon and graphite materials obtained with a new measurement technique, which avoids free rotation of the samples in the magnetic field, was investigated.
用一种能避免样品在磁场中自由转动的新的测定技术测定了多粒炭石墨材料的磁化率。
Integrated control measures included tobacco rotation with rice, rice straw return to paddy field, winter ploughing and winter planting, use of tolerant rice cultivars.
综合防治措施包括烟-稻轮作、稻草还田、冬翻冬种、利用耐病品种和药剂防治。
Different thermal boundary conditions affected the flow field, then affected the heat transfer, rotation was the main reason of the affection, viscous heating and buoyancy were two important factors.
转动是热边界条件影响左右盘壁面换热系数的主要原因，粘性热和浮升力也是导致热边界条件对换热系数有影响的两个重要因素。
These correlations depend not only on the state of the basic stress field in the island arc-trench but also on the additional stress field caused by the variation of rotation velocity of the earth.
这种特征可能不仅和海洋与大陆板块汇聚边界的岛弧海沟上的基本应力状态有关，而且与自转速率不均匀产生的附加应力状态有关。
This paper introduces an improved algorithm for fingerprint direction field estimation, the rotation angle estimation during constructing the singular point models is analyzed in details.
本文提出了一种改进的指纹纹线方向场计算方法，其中重点分析了奇异点模型中旋转角度的估计方法，并在复数域内简化了纹线方向场的优化计算。
The field was planted with barley, oats and rye in rotation.
这块地轮种大麦、燕麦和黑麦。
The dynamic stability derivatives which are used for analysis and prediction the characters of spin are acquired in routine flow field usually, which has no effect of rotation.
尾旋特性分析及预测时所使用的动导数通常是在常规流场中获得的，测得的动导数没有体现旋转流场的影响。
The dynamic stability derivatives which are used for analysis and prediction the characters of spin are acquired in routine flow field usually, which has no effect of rotation.
尾旋特性分析及预测时所使用的动导数通常是在常规流场中获得的，测得的动导数没有体现旋转流场的影响。
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