活化：使金属表面钝化状态消失的作用。
Activation: the metal surface passivation state disappear role.
牙齿表面的状态不好，会导致马难以维持恰当的体重。
Poor tooth surface impacts the horse's capability to maintain a proper weight.
目的：研究牙冠表面电阻状态。
Aim: to study the electric resistance of the crown surface of tooth.
从表面的吸附状态转变为气态或液态。
When you melt ice, it passes from a solid to a liquid state.
从表面的吸附状态转变为气态或液态。
When you melt ice, it passes from a solid to a liquid state.
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