### Chinese: 如果大概到了周期，莫名其妙拉肚子，基本上两天内会来月经。
### English: If you probably reach the cycle, inexplicably diarrhea, basically within two days will come to menstruation.
### Errors: There is a major error of incorrect translation has stylistic problems at "If you probably reach the cycle". There is a major error of incorrect translation includes information not present in the correct translation at "inexplicably diarrhea". There is a major error of incorrect translation is missing content from the correct translation at "in two days". There is a major error of wrong grammatical register (eg, inappropriately informal pronouns). internal inconsistency (not related to terminology) at "basically within two days will come to menstruation".

### Improved English: If you are near the cycle and you have diarrhea for no reason at all, you will basically get your period within two days.