繁忙的交通让主干道超负荷运行。
6. You can spare two or three hours a day, break them up into some periods to avoid brain overload.
你可以每天空出两到三小时，把他们分成若干时间段来用，以防止大脑超负荷工作。
7. The electrical system is overloaded because of the hot weather.
因为天气炎热，整个电力系统已经超负荷了。
8. The teacher is overworking the students.
老师给学生们的任务已经超负荷了。