On average, adults need about 7 to 9 hours of sleep per night.
平均而言，成年人每晚需要大约7到9小时的睡眠。
Students spend on average 2 hours a day on homework.
学生平均每天花2小时做作业。
On average, women live longer than men.
平均而言，女性比男性寿命更长。
The company receives on average 500 customer inquiries per week.
该公司平均每周收到500条客户咨询。
On average, it takes 30 minutes to commute to work in this city.
在这座城市，通勤上班平均需要30分钟。
People in this region consume on average 2 liters of water a day.
该地区的人平均每天饮用2升水。
On average, temperatures have risen by 1.2°C over the past century.
在过去一个世纪中，平均气温上升了1.2°C。
A healthy adult walks on average 10,000 steps a day.
一个健康的成年人平均每天走一万步。