I am studying two majors, and it's quite a burden on my time.
我有两门主修课,这占据了我很大一部分时间。
I'm the healthiest pupil in my team.
我是我的那一队伍中最健康的学生。
As no pumas had been reported missing from any zoo in the country, this one must have been in the possession of a private collector and somehow managed to escape.