Electric force curves

• 电力线

Electric force curves的用法和样例：

例句

1. 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。
2. As in ordinary MR, the field produces an additional force on the charges, deflecting them like a plane in a crosswind, so that they travel at an angle to the electric field lines.
   和一般的磁阻一样，磁场对电荷施加另外一个力，使得它们如受到侧风的飞机一样转向，如此一来，电荷飞行的方向会和电力线成一个角度。