He realized that he’d been looking for the wrong thing: a constant magnetic field didn’t cause an electric current in a loop of wire.

他意识到他一直在寻找错误的东西：恒定的磁场不会在电线环中产生电流。

He realized that he'd been looking for the wrong thing: a constant magnetic field didn't cause an electric current in a loop of wire.

恒定的磁场不会在导线环中产生电流。

Also, notice that a positively charged particle  moving through a constant electric field like this will experience an electrostatic force  in the direction of the electric field.

另外，请注意，带正电的粒子在这样的恒定电场中移动时，将会在电场方向上受到静电力。

In other words, the motion  of a charged particle through a constant electric field will have similar characteristics to a  mass moving through a constant gravitational field near the surface of a planet.

换句话说，带电粒子穿过恒定电场的运动将具有与质量穿过行星表面附近的恒定重力场的运动相似的特性。