The scheduling engine works to make sure that all constraints are met when it reschedules tasks .
当计划引擎重新安排任务时,将尽量确保满足所有约束。
Mr. breslin , the principal , says farmington high sometimes reschedules tests and other events if students complain the pressure is too great . But he doesn 't favor suggestions by some parents that the school limit the advanced-placement courses or activities that students participate in .