如果发生巨变，穿过塑料的中子就会引发材料内质子反冲，从而留下痕迹。
If fusion was taking place, then neutrons flying through the plastic would cause protons within the material to recoil, leaving telltale tracks.
网站也能够留下曾被访问过的永久的痕迹，从而允许本地用户能够检测到访问者的访问。
Sites could also leave persistent indications that they had been visited, allowing visits to be detected by local users.
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