Students studying for a particular degree will take a series of lecture courses which run inparallel at a fixed time in each week and may last one academic term or the whole year.
攻读特定学位的学生将在每周的固定时间同时参加一系列讲座课程，可能持续一个学期或一整年。
2
The typical trench system in World War I consisted of a series of two, three, four, or more trench lines running parallel to each other and being at least 1 mile (1.6 km) in depth.