mobility
n. （住处、社会阶层、职业方面的）流动能力；活动性，灵活性
例句
Recent years have witnessed a growing social mobility.
近年来人们的社会流动性越来越大。
《牛津词典》
Prior to the nineteenth century, there were almost no channels of social mobility.
19世纪以前，几乎没有社会流动的渠道。
《柯林斯英汉双解大词典》
It represented upward social and financial mobility.
它代表了社会和金融的向上流动。
