1、
2、
The number of students in each class is creeping up, averaging from three to four.
每个班级的学生人数正缓慢增加，平均从三人上升到四人。
金山词霸
3、
Somalia, home to 7.9 million people, sees an average weekly income per person of around £1.60.
索马里拥有790万人口，每人每周的平均收入约为1.60英镑。
金山词霸
4、
