upstream

adv, adj in the directionfrom which a river, etc flows; against the current 向上游（的）; 逆流（的）: row, swim, walk upstream 往上游划、 游、 行走 * Factories upstream (from us) are polluting the water. 在（我们）上游的工厂污染了河水. Cf 参看 downstream.

uppermost, uppish, upraise, upright, upright piano (also upright), uprightness, uprising, uproar, uproarious, uproariously, uproot, upset, upshot, upside, upside down, upside-down, upstage, upstairs, upstanding, upstart, upsurge, upswing, 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,