His frequent absence from class must be dealt with immediately.
他经常缺课的情况必须立即予以处理。
The teacher called Tom to account for his repeated absence from class.
老师要求汤姆说明他一再缺课的理由。
He was criticized by the teacher for his absence from class rather than his failure in the exam.
他因缺课而受到了老师的批评，而不是因为他这次考试的失败。
British physician who first recognized a new class of genetically induced diseases resulting from a mutation in a single gene that causes the absence or malfunctioning of a particular enzyme.
英国内科医生。他首先发现一类新的基因诱导疾病是由于某一个基因发生突变从而导致某种特殊的酶缺乏或产生故障而引发的。
An unexcused absence, as from school or a class.
旷课，逃避未经允许的缺席，如。
An unexcused absence, as from school or a class.
旷课，逃避：未经允许的缺席，如逃学或旷课。
An unexcused absence, as from school or a class.
旷课，逃避：未经允许的缺席，如逃学或旷课。
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