The teacher noticed a significant deviation in the students' test scores, which indicated some students were not performing up to standard.
老师注意到学生们的考试成绩出现了显著偏差，这表明有些学生没有达到标准。
There was a deviation from the planned curriculum due to the unexpected snowstorm.
由于意外的暴风雪，课程计划出现了偏差。