So this says that it's impossible, by definition, to measure exactly the state -- i.e., the position -- and the momentum of a particle, because the act of measuring it, by definition, changes it.
那么是这样的 就定义本身而言，是不可能 准确测量一个粒子的状态，比如，位置， 以及它的动量， 因为按照定义，测量这个动作就在改变这个粒子。