The very popular in academic history factual prooflaw, this is very necessary.
在历史学界很盛行事实论证法，这是非常必要的。
2
South Africans must supply proof of identity and address to get a cell phone or SIM card from next month under a new law aimed at fighting the country's notorious rates of crime.
从下个月开始，南非人在国内购买手机产品或SIM卡之前，必须要提供身份及地址证明。
3
So, if also like physics as remove each experiment record personality and only see its generality, historical law also can use experimental proof.