upward mobility

movement into a higher and wealthier social class 向较高和较富有的社会阶层的流动. ,upwardly `mobile ready and able to move in this way 能向较高社会地位和经济地位流动的: upwardly mobile young executives 能升迁的年轻行政人员.

uproot, upset, upshot, upside, upside down, upside-down, upstage, upstairs, upstanding, upstart, upstream, upsurge, upswing, uptake, uptight, uptown, upturn, upturned, upward, upward (also upwards / -wEdz; -wLdz/), upward(s), upwards, upwards of, upwind, uranium, urban, urbane, urbanely, urbanity, urbanization, urbanisation, urbanize, urbanize, urbanise, urchin, Urdu, urea, ureter, urethra, urge, urge sb to do, urge sb. on,