相关单词同义词enhancement, increase, gain, rise, upgrade, rebound, step up, 近义词 increase 增加, improvement 改进, upturn 情况好转, pickup 拾起, pick-up 提取，取货, turnaround 周转时间, turnround 突然转好（或转坏）..., upsurge 高潮临近词up, upto相似词upstart, upstate, upstream, upsurge, uptake, uptalk, uptight, uptown, 返回 upswing