Both ammonium-oxidizing and denitrifying reaction in MBR accord to zero-grade reaction formula, and the corresponding degradation rate constant was 2.2 and 2.5 times respectively over CAS.
Missing or late assignments will receive a "zero" grade in evaluating the homework contribution to the final grade.
在期末作业成绩部分，没交或迟交的作业将以零分计算。
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For younger children, a dictee to test spelling is marked by pro GREssively deducting points for every error, which can crush the grade down to zero, or even into negative territory.