### 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 it is likely to come to the cycle, the stomach will basically come in two days.
### Errors: There is a major error of incorrect translation is missing content from the correct translation at "If it is likely to come to the cycle". There is a major error of incorrect translation has stylistic problems at "the stomach". There is a major error of incorrect translation includes information not present in the correct translation at "the stomach will basically come".

### 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.