连续工作四个小时以上，至少休息三十分钟；

连续工作四个小时以上，至少休息三十分钟；

Results (English) 1:

Work continuously for more than four hours with at least 30 minutes of rest;

Results (English) 2:

Work continuously for more than four hours and rest for at least thirty minutes;

Results (English) 3:

Continuous work for more than four hours, at least 30 minutes rest;