upward momentum的用法和样例：
例句
- Indicators for earnings momentum remain upbeat with more earnings upgrades than downgrades.
收益上升势头依然持续，对收益向上的调整多过向下的调整。 - Wall Street showed signs of fatigue yesterday after its recent exertions although European and Asian stocks managed to maintain their earnings-driven upward momentum.
在最近大幅上涨之后，美国股市昨天显示出疲软迹象，但欧洲和亚洲股市仍保持了业绩驱动的上升势头。
