曾有一段时间，每个老师每周都花一小时来测验学生的各门功课。
There was a time when each teacher spent an hour, one day a week, testing students in every subject.
为了解决这个问题，科学家建议学生应该少做功课，多花点时间睡觉。
To solve this problem, scientists advise that students should get less schoolwork and more time to sleep.
学生们一直在努力学习功课，他们的努力终将获得成功。
The students have been working hard on their lessons and their efforts will be rewarded with success in the end.
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