翻译英语"因为香港和大陆有不同的法治，所以去香港悔必须要办一些必须的证件"

Because Hong Kong and China has different legal system, therefore going to Hong Kong need some special application.

上海灵格风英语

As HongKong and Mainland China have different laws,some neccessary ID cards are required when going to HongKong.

you need some ID cards for going to HK,cause some difference in low system between HK and the Chinese mainland.
btw,上海灵格风英语的句子里面表示原因的词重复了！

Hong Kong and the mainland have different rule of law, so our regret to have to do some of the necessary documents