upswing

n ~ (in sth) (esp sudden) upward movement or trend; improvement （尤指突然的）向上的运动或倾向; 上涨; 改进: This policy led to an upswing in the party's popularity. 这一政策使该党深得人心. Cf 参看 upturn.

upraise, upright, upright piano (also upright), uprightness, uprising, uproar, uproarious, uproariously, uproot, upset, upshot, upside, upside down, upside-down, upstage, upstairs, upstanding, upstart, upstream, upsurge, uptake, uptight, uptown, upturn, upturned, upward, upward (also upwards / -wEdz; -wLdz/), upward mobility, upward(s), upwards, upwards of, upwind, uranium, urban, urbane, urbanely, urbanity, urbanization, urbanisation, urbanize, urbanize, urbanise,