So, some of these cases were probably due to polio that was transmitted by incompletely killed virus that was present in the vaccine.
因此,那些病例的发病的原因,是被那些疫苗中携带的,没有被完全杀死的病毒感染
There is a repulsive force, the attractive force between ions of opposite charge is offset by a repulsive force due to electron cloud interactions.
有一个斥力时,存在于电性不同的离子间的引力,是可以被抵消的,因为电子可以相互影响。
What you could call institutional evil by somebody behaving cruelly toward somebody else, perhaps not due to malice but because of the situation that she's in.
你可以将此称作,机构性邪恶,产生于某人残忍地对待他人,或许不是出于恶意,而是由于她所处的境况而导致
You cannot say to me, "Take a force, due to a spring, and see what force it applies and divide by the acceleration and get the mass, " because we haven't defined force, either.
你不能说,"给弹簧施加一个力,看看它能提供多大的力,然后除以加速度,得到质量",因为我们还没给力下一个定义
We did the comparison with the elephant or something; a is the second derivative of x and for this problem, when F is due to a spring, we know the force is that by studying the spring.
我们也已经把它与大象或其它东西作过比较,a 是 x 的二阶导数,在这个问题中,F 是由弹簧产生的,我们在讨论弹簧问题时已经知道了力的大小
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