### Chinese: 无缘无故有可能迟到半小时
### English: May be half an hour late for no reason
### Errors: There is a minor error of incorrect translation is missing content from the correct translation at "May be instead of They will probably be". There is a minor error of incorrect translation has stylistic problems at "for no reason instead of for no reason at all".

### Improved English: They will probably be late for half an hour for no reason at all.