上四年级时，他频频旷课。In his fourth year he was truanting regularly.每天早上,老师都记下学生们到校 、 旷课以及迟到等出勤情况.Each morning the teacher marks the pupils present , absent or late.旷课的学生占百分之几?What percentage of the students were absent?...
Their subsistence comes from the sea.他们依赖海洋生活。Their main mode of subsistence is hunting.他们主要以打猎为生。They were living barely above the level of subsistence.他们的生活水平勉强在最低水平线以上。Many families are living below the level of subsi...