prehistory

中文： 史前、史前时代、史前史、发展背景

1. The time before written records in any area of the world; the events and conditions of those times. (countable, uncountable)
2. The study of those times. (countable, uncountable)
3. Any past time (even recent) treated as such a distant, unknowable era. (countable, uncountable)
4. The history leading up to some event, condition, etc. (countable, uncountable)

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