There was a little world in which there were, I think, no cars were allowed with no electric lights, I think.
那里的世界,没有汽车,我想也没有电灯。
My aunt and I decided to buy a new electric refrigerator with the money I had sent her from California; it was to be the first one in the family.
我阿姨和我决定用我在加州给她寄的钱,买一个新的电冰箱;,家里的第一个电冰箱。
We know what an electric field is, it's just a space through which a Coulomb force operates.
我们知道,电场不过,是库仑力的作用空间。
If we put a dipole that has the freedom to move, we put that dipole in an electric field, it will align itself with the field lines.
若我们将偶极释放到自由空间中,比如说放到电场里,他们会自动排序按同一方向。
Now, when the first chimpanzee hits the lever the second chimpanzee gets a painful electric shock, putting the first chimpanzee in a horrible dilemma.
当第一只黑猩猩拍杠杆时,第二只黑猩猩就会受到痛苦的电击,这样第一只黑猩猩就进退两难了。
You've got a magnetic field, maybe even magnetic susceptibility, the electric field. We're not going to worry about these magnetic fields or electric fields in this class So, pretty much we're going to focus on this set of variables here.
你也会引入磁场,或许甚至磁化率,以及电场,我们这堂课不需要关心,这些磁场或,电场之类的东西,基本上我们只关注,这里的一组变量。
We can also do a similar thing, and I'll keep my distance from the board, but we can instead be holding x constant, for example, putting x to be equal to zero, and then all we're doing is considering the electric field as a function of t.
我们也可以做类似的事情,把x固定为一个常数,例如令x等于零,然后,考虑电场作为时间的函数,这种情况下,我们划掉。
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