您要查找的是不是：
- Magnetic lines of force do exist though invisible. 磁力线虽然看不见，但确实存在。
- You have chosen the wrong direction of the magnetic line of force. 你把磁力线的方向弄反了。
- When the generator rotor spins, the magnetic field is rotating, the generator stator conductor cutting magnetic line of force will have a current sensor. 当发电机转子旋转时，磁场也是旋转的，发电机定子内的导线就会切割磁力线感应产生电流。
- The magnetic lines of force are in effect glued to the interstellar gas, and they follow the clouds in their capricious motions. 磁力线实际上是紧附在星际气体上，并跟随星际云一道作着变化莫测的运动。
- It has been suggested that birds can sense the magnetic lines of force stretching from the north to the south magnetic poles of the earth . 有人提出：鸟能感觉到从地球北极通向南极的磁力线。
- Magnetic lines of force will, whenever possible, travel through iron or other magnetic materials. 磁力线只要有可能就会通过铁或其他磁性材料。
- Observation of magnetic lines of force in magnetic microfield by clectron holography[J]. 引用该论文 马建;傅淑芬;陈建文;王之江;曹涵清.
- It has been suggested that birds can sense the magnetic lines of force stretching from the north to the south magnetic poles of the earth. 有人提出：鸟能感觉到从地球北极通向南极的磁力线。
- It has been suggested that birds can sense the magnetic lines of force stretching from the north to south magnetic poles of the earth,and so direct themselves. 有人认为，鸟类能觉察得出地球自北向南磁极的磁力线，因而能为自己导向。
- It has been suggested that birds can sense the magnetic lines of force stretching from the north to south magnetic poles of the earth, and so direct themselves. 有人认为，鸟类能觉察得出地球自北向南磁极的磁力线，因而能为自己导向。
- In the earth's core, because of the Coriolis effect, eddies and vortices in the fluid twist magnetic lines of force into bundles that look somewhat like piles of spaghetti. 在地核中由于科氏力效应，流体中的涡流将磁力线扭结成团，看起来就像一团团的义大利面条。
- The lines of force of a magnetic field. 磁力磁场的磁力线
- The distribution of the magnetic line of force and the formula for magnetic induction induced by a circular current 圆电流磁感线的分布及磁感应强度的函数表达式
- Down the lines of force he plunges, until he is on the surface. 他扎进了一条能量线，直达地表。
- "The magnetic lines of force don't exist, they are defined by scientists." "磁力线并不存在,它是由科学家所定义。"
- magnetic line of forcen. 磁力线
- Hence only one line of force can pass through each point of the field. 因此电场中任一点只能通过一条电力线。
- Participation in tender is in our line of business. 参加投标属于我们的业务范围。
- A long line of car is unable to pass that road hog. 一长串的车子无法超越那个挡道的汽车驾驶。
- How do you get start in that line of work? 你是怎么开始干那一行的？
