I once saw a news report that someone found some metal "balls" at the bottom of the pot while eating pig bone soup. Later, it was found that there was even some in the pig bones, which was confirmed to be water. However, even if pig bones contain heavy metals, they will not exist in the form of simple substances, but should be compounds of heavy metals. It is suspected that the mercury in this bone was deliberately poured or contaminated. This situation should be an example.

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