A metaphor for something extremely tiny, insignificant, or utterly worthless.
在广阔的宇宙中，人类的生命或许如虫臂鼠肝般微不足道，但依然有其存在的意义。
In the vast universe, human life may be as insignificant as an insect's arm and a rat's liver, yet it still holds its own meaning.
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