使用提示语来刺激用户和鼓励用户采取行动，对于减少用户中途退出网站的数量是非常有意义的，同时，帮助潜在的客户更好地理解系统是如何工作的。

Using empty states to motivate users and animate actions, you can significantly reduce the amount of “drop-outs” and help your potential clients to gain a better understanding of how the system works.

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另一方面，马克思指出这两个模型的背离是系统的，具有重大意义，足以在其他观察者面前隐藏潜在的关系。

Marx, on the other hand, points out that the deviations between the two models are systematic and significant enough to conceal the underlying relationship from other observers.

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实验证明，间充质干细胞对神经退行性疾病、神经免疫性疾病、神经系统损伤性疾病和脑血管疾病都有积极的治疗意义，尽管其潜在的作用机制尚未明确。

It has been proven that MSC could be beneficial in the treatment of a variety of diseases in central nervous system, though the underlying mechanisms are still unknown.

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