1、缺勤
... get down to 开始认真处理，着手做 be absent from 缺勤，缺课 come to a conclusion 得出结论 ...
2、缺席
... absent adj.缺席的;不在的 vt.使缺席;使离开 be absent from缺席;不在 presence n.出席;到场 ...
3、不在
... absent adj.缺席的;不在的 vt.使缺席;使离开 be absent from缺席;不在 presence n.出席;到场 ...
4、制度
... base on以…为依据，以…为出发点 be absent from制度，不在，没到场，没参加 be absorbed in专心于 ...
be e absent from缺席
be absent from class缺课
be absent from mess未去食堂吃饭
be absent from school缺课;旷课;茫然的;缺席
Be absent from classes缺课;逃课;旷课
to be absent from不在
be absent from work旷工
to be absent from work缺勤
Be absent from the meeting没有出席会议