形容词
中文翻译：意为
同义词：
['average', 'common', 'average', 'ordinary', 'standard']
例句：
-
1. The mean temperature of the year is around 15 degrees Celsius.
年均温度大约是15摄氏度。
-
2. The mean income for a family in this area is around $30,000 per year.
该地区家庭的平均年收入约为3万美元。
-
3. The mean life expectancy for men is 68 years old, while women are slightly older at71 years old.
男性的平均预期寿命为68岁，而女性稍高，为71岁。